Resources · 23

Prioritize vulnerabilities and verify remediation

Connect known exploitation, exposed assets, business impact and proof of a working fix.

· 9 min

Fictional cyber observatory with three trays separating advisories, inventory and remediation evidence, without people

What this guide helps achieve

  • Match alerts to assets
  • Rank actual urgency
  • Roll out safely
  • Verify and close

Quick check

  • Is the affected product and version actually deployed?
  • Is the asset reachable and business critical?
  • Is exploitation documented?
  • What protects the service before a patch?
  • Does a check confirm the problem is gone from the asset?

Step-by-step method

  1. 01

    Consolidate the inventory

    Map services, products, versions, environments, exposure and owners. A component advisory alone does not prove that a vulnerable instance is deployed.

    Deliverable: dated affected-asset list and uncertainties.

  2. 02

    Qualify the finding

    Compare the vendor advisory, CVE identifier, exploitation conditions and, where relevant, CISA’s catalog of known exploited vulnerabilities. Record when each source was checked.

    Deliverable: finding with primary references.

  3. 03

    Set a defensible priority

    Consider known exploitation, asset reachability, required privileges, data handled, service impact and available remediation. Assign an owner and context-specific deadline.

    Deliverable: reasoned priority decision.

  4. 04

    Prepare the change

    Map dependencies, change window, backup and rollback. If an update cannot be applied promptly, record the temporary control and its expiry.

    Deliverable: rollout plan and limited exception.

  5. 05

    Deploy and test

    Apply the vendor fix or mitigation using the approved process. Check the resulting version, business journey and integrations that may regress.

    Deliverable: deployment record and functional result.

  6. 06

    Verify closure

    Check the actual asset with a suitable method, find missed instances and revisit exceptions. Do not close a ticket because an update was merely scheduled.

    Deliverable: verification evidence and updated register.

Management indicators

IndicatorWhat it measuresFirst action
CoverageCritical assets with known versions and ownersComplete the inventory
DelayTime from qualification to verified fixRemove repeated bottlenecks
VerificationFixes retested on real assetsReopen closures without evidence
ExceptionsWaivers with control, owner and expiryClose expired exceptions

Common pitfalls

  • Ranking solely by a generic score without checking the asset
  • Assuming a KEV listing means the product exists in your estate
  • Deploying without testing service behaviour
  • Leaving compensating controls without a review date

Frequently asked questions

Must the highest-scored CVE always go first?

A score describes technical severity; known exploitation, exposure and local service impact guide your operational order.

What if no patch exists?

Follow vendor mitigations, reduce exposure where possible and document an owner, review date and residual risk.

When is the work closed?

After the version or mitigation has been verified on affected instances and critical functionality has been tested.

References: data, uses and limitations

Documentation reviewed on .

Vulnerability: three complementary viewsCVE · Identify. CVSS · Technical severity. EPSS · Probability. KEV · Known exploitation. Affected version and product. Score from 0.0 to 10.0. 30-day horizon. Official CISA catalogue. Local decision: exposure, impact, evidence and remediation checks.Vulnerability: three complementary viewsCVE · IdentifyAffected version and productCVSS · Technical severityScore from 0.0 to 10.0EPSS · Probability30-day horizonKEV · Known exploitationOfficial CISA catalogueLocal decision: exposure, impact, evidence and remediation checks
Vulnerability: three complementary views
References: data, uses and limitations
Source and purposeVerified data or benchmarkHow to use itLimitation to retain
FIRST · CVSS

Describe technical vulnerability severity using an explicit method and vector.

CVSS 4.0 scores run from 0.0 to 10.0. Base, Threat, Environmental and Supplemental metric groups serve different purposes. Retain the score version, vector and date. Compare it with the installed version, access paths and business consequences before ordering remediation.

Explore the method →

A high score is not evidence of exploitation; a low score does not mean a service has no risk.
FIRST · EPSS

Estimate exploitation probability for a published CVE.

The model looks ahead 30 days. Its score is a probability; its percentile ranks that score relative to other CVEs. Record the data date and distinguish probability from percentile. Add asset exposure and confirmed exploitation evidence.

Explore the method →

The model does not predict harm to your organisation. Low probability does not cancel a critical exposure.
CISA · Known Exploited Vulnerabilities

Identify vulnerabilities listed by CISA as known to be exploited.

The catalogue includes CVE, product, date added and required action. Its official repository also provides the data schema. Check applicability to your products and retain the access date. Review the requested action and vendor advisory before confirming remediation.

Explore the method →

Absence from the catalogue does not establish safety. Administrative deadlines in it are not automatically binding on every organisation.

CVSS, EPSS, KEV and VEX

Vulnerability prioritisation: four signals to connect to the asset

A vulnerability queue often mixes information answering different questions. CVSS describes technical severity, EPSS estimates a probability of observed exploitation, KEV records known exploitation and VEX carries a product applicability assertion. A local decision still needs the deployed version, access paths and consequences of exploitation.

These are documentary reference points. EPSS examples, situations and the VEX product are fictional; no current CVE score, real inventory or scan result is presented. This page calculates neither CVSS, organisational risk nor an automatic priority. Proposed evidence and decisions are a local editorial method.

Four distinct signals for a local decision
Four distinct signals for a local decision Four independent panels: CVSS describes severity; EPSS estimates observed exploitation within thirty days; KEV records known exploitation; VEX states declared applicability. Compare them with the deployed product and its context without adding them into one score. CVSS · Severity Metrics and vector Version and author EPSS · Probability Thirty-day horizon Separate date and rank KEV · Known exploitation Product and requested action Catalogue edition VEX · Applicability Issuer, product and time Status and justification Local decision: deployed asset, exposure, consequences, owner and evidence.

Four independent panels: CVSS describes severity; EPSS estimates observed exploitation within thirty days; KEV records known exploitation; VEX states declared applicability. Compare them with the deployed product and its context without adding them into one score.

Four questions and four kinds of information

Four questions and four kinds of information
SourceUseful questionWhat it cannot establish alone
CVSS 4.0What is the technical severity under the assessed metrics?The score proves neither exploitation nor consequences for your service.
EPSSWhat is the estimated probability of observing exploitation of this CVE in the next thirty days?It does not describe compromise of your instance, its controls or business loss.
CISA KEVIs the vulnerability listed as known to be exploited?Listing does not establish that the product exists in your estate; absence does not establish safety.
VEXWhat does an issuer assert about a vulnerability for identified products at a stated time?An assertion alone proves neither deployment of the relevant version nor issuer trustworthiness.

CVSS 4.0: preserve groups, vector and assessment author

A number from 0 to 10 loses meaning when its version, vector and assessed groups disappear. FIRST distinguishes CVSS-B, CVSS-BT, CVSS-BE and CVSS-BTE. Undefined Threat and Environmental metrics take default values rather than disappearing from the calculation.

CVSS 4.0: preserve groups, vector and assessment author
GroupRoleReading check
BaseIntrinsic vulnerability characteristics.A supplier’s CVSS-B is not your priority decision.
ThreatThreat characteristics that can change over time.Date the assessment and explain exploitation information used.
EnvironmentalCharacteristics specific to the consumer’s environment.State the controls and system importance considered rather than silently changing a score.
SupplementalAdditional context, such as Safety or Recovery.These metrics do not modify the final CVSS score; they may inform a separate local analysis.

EPSS: probability, percentile and missing data

FIRST describes a probability from 0 to 1, updated daily, over a thirty-day horizon. The percentile is a relative rank among currently scored vulnerabilities. Do not add probability and percentile or turn their pair into the probability of an attack on your organisation.

EPSS: probability, percentile and missing data
Fictional exampleProvided valuesCorrect reading
A probabilityProbability : 0.05 · Percentile : Unspecified0.05 means a 5% estimated probability of observed exploitation within the model horizon, rather than an estate compromise rate.
Probability and rankProbability : 0.02 · Percentile : 0.97In this fictional example 0.02 means 2%, while 0.97 places the score at the 97th percentile. The rank does not turn a 2% probability into 97%.
No received valueProbability : Unspecified · Percentile : UnspecifiedMissing data remains unknown; it is neither zero nor evidence of no exploitation. Record the failure or the date of the last available value.

Seven useful readings of the KEV schema

The official CISA repository schema describes the catalogue and its entries. The following selection helps retain consultation context rather than enumerate every field. Match each entry to the supplier advisory and actual asset.

Seven useful readings of the KEV schema
FieldsMeaningProposed check
catalogVersion / dateReleasedCatalogue version and publication time.Keep a reference to the consulted edition; distinguish publication time from your assessment time.
cveID / vendorProject / productIdentifier and product associated with the entry.Match name, version, distribution and embedded components before declaring an asset affected.
dateAddedDate the vulnerability entered the catalogue.Do not present it as the first exploitation date or CVE publication date.
requiredActionRequested action to address the vulnerability.Read the complete instruction and supplier references, then document local implementation.
dueDateCatalogue deadline for the requested action.Check the context and scope of the CISA instruction before adopting it as a local deadline.
knownRansomwareCampaignUseKnown indicates confirmed ransomware campaign use; Unknown means CISA lacks confirmation.Do not translate Unknown into never used or a definite false value.
cwesWeakness category codes associated with the entry.Use categories to group causes; they do not replace the CVE identifier or affected version.

Six fictional situations: what is missing before a decision?

High severity, product not located

An advisory reports high severity; the inventory cannot locate that version in the estate.

Confirm presence and version with the owner, including embedded dependencies.

Retain applicability unknown. Absence from an incomplete inventory does not justify closure.

Known exploitation, exposed instance

The vulnerability is listed as known to be exploited and an owner confirms an affected internet-accessible instance.

Review supplier actions and arrange exposure reduction and remediation suited to the service.

Name the owner, interim control and expected verification evidence; a severity score alone supplies none of this traceability.

Low probability, essential service

The fictional EPSS probability is low, but the affected instance supports an essential service.

Assess consequences and access paths before agreeing a change window.

Do not treat a low score as insurance; that instance’s controls are not contextual inputs to EPSS.

VEX for another version

The supplier declares version 2.4.0 not affected; the asset still runs 2.3.0.

Seek an assertion applicable to the installed version and verify its provenance.

Do not extend a conclusion across versions. A VEX document deploys no update.

Temporary control becomes permanent

A temporary rule reduces access; its review date has passed.

Check that it still protects the relevant path, then decide whether to maintain it or apply the fix.

Keep the owner, limits and a new review date. A perimeter control is not automatically an OpenVEX built-in product mitigation.

Patch announced, deployment unverified

A fixed release is available, but the ticket contains only a download link.

Check the version actually deployed, remaining instances and critical functionality.

Close on implementation and verification evidence, rather than the supplier’s availability of a patch.

Eight records for a traceable remediation decision

  • Product, version or build, environment and asset owner.
  • Vulnerability identifier, supplier advisory and relevant exploitation conditions.
  • CVSS version, vector, metric-group nomenclature and assessment author.
  • EPSS date, probability and percentile in separate fields, or an explicit missing value.
  • Dated KEV status, requested action and consulted catalogue edition.
  • Applicable VEX assertion: issuer, product, version, time and any justification.
  • Reasoned local decision, interim control, owner and review date.
  • Deployment or mitigation evidence, verification result and remaining limits.

Read VEX statuses and applicability conditions →

Primary sources and scope

Sources checked on

Build signatures and provenance

Verify patch origin and then its application

A fixed version needs connecting to the received package and updated instance. Provenance verification helps establish expected origin; remediation confirmation still requires checking the active version and relevant behaviour.

  • Keep the accepted patch digest and signature/provenance verification results.
  • Match that package to the version actually deployed on each targeted instance.
  • Do not close on authenticity alone: document remediation checks, regressions and remaining limits.

Read the pre-deployment provenance reference →

Sources checked on · SLSA 1.2 · Build: Verifying artifacts · SLSA 1.2 · Build: Provenance · SLSA 1.2 · Build: Track Basics · in-toto · Statement v1 · Sigstore · Verifying Signatures

Explore the CISA KEV catalogue

KEV is CISA’s catalogue of vulnerabilities known to be exploited. This explorer contains a complete dated snapshot, not a live feed. A CVE or product-name match is a lead to compare with the exact deployed product and version; it does not prove that a visitor’s system is vulnerable or compromised.

Entry names, products, descriptions, required actions and links retain CISA’s language and values. Explanations are editorial. Entries may be added or corrected after this snapshot; consult the official source before an operational decision.

Entries
1769
Distinct vendor/project labels
291
Catalogue release date

Counters describe this snapshot only. They do not measure attack counts, vulnerability prevalence or an organisation’s risk. Distinct vendorProject labels are counted exactly as published, without merging aliases or treating them as distinct companies.

Unknown means CISA lacks confirmation of use in a ransomware campaign; it does not mean no exploitation. forensicTriage Yes/No is a separate field described by the schema with a reference to BOD 26-04. An absent field stays unreported. Neither No nor Unknown demonstrates that your asset has not been compromised.

dueDate is the deadline published in the CISA entry for the stated action. It is not a universal SLA, a patch release date or evidence that a patch was installed. The forensicTriage field alone cannot determine your obligations or define an investigation plan.

Six readings that prevent a misleading priority

Six readings that prevent a misleading priority
Published fieldUseful readingConclusion to avoid
cveIDJoin sources discussing the same vulnerability.The identifier year does not date KEV inclusion.
vendorProject · productFind the vendor advisory and local inventory.A product name does not replace affected versions and configurations.
dateAddedDate the entry’s inclusion in this catalogue.Do not call it discovery or first-exploitation date.
dueDate · requiredActionRead the published action and deadline together.Do not turn the date into a universal obligation or proof of remediation.
knownRansomwareCampaignUsePreserve Known, Unknown or an absent field.Unknown is not No and does not remove the known exploitation signal underlying KEV.
forensicTriage · cwesSeparate CISA’s indicator from published weakness classes.A CWE is not a specific product or score; No is not a certificate that no incident occurred.

Catalogue additions by year

Catalogue additions by yearEach bar counts entries retained in this snapshot by the year of dateAdded. It is not a discovery year or an exploitation frequency. The first year starts at this snapshot’s earliest entry and the release year is incomplete; these totals are not an annual attack trend.311202155520221872023186202424520252852026
Each bar counts entries retained in this snapshot by the year of dateAdded. It is not a discovery year or an exploitation frequency. The first year starts at this snapshot’s earliest entry and the release year is incomplete; these totals are not an annual attack trend.
Catalogue additions by year · dateAdded
Year addedEntries
2021311
2022555
2023187
2024186
2025245
2026285

Results : 555 / 1769 · Page 3 / 23

Explore the CISA KEV catalogue · 2026.11.06
CVEVendor or project · productDate added / Entry due dateUse in ransomware campaigns / forensicTriage
CVE-2018-7445

CWE-119

MikroTik

RouterOS

Entry and action published by CISA

MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability

In MikroTik RouterOS, a stack-based buffer overflow occurs when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system.

requiredAction
Apply updates per vendor instructions.
notes
https://www.coresecurity.com/core-labs/advisories/mikrotik-routeros-smb-buffer-overflow#vendor_update, https://mikrotik.com/download; https://nvd.nist.gov/vuln/detail/CVE-2018-7445

www.coresecurity.com ↗

mikrotik.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2020-9934

Apple

iOS, iPadOS, and macOS

Entry and action published by CISA

Apple iOS, iPadOS, and macOS Input Validation Vulnerability

Apple iOS, iPadOS, and macOS contain an unspecified vulnerability involving input validation which can allow a local attacker to view sensitive user information.

requiredAction
Apply updates per vendor instructions.
notes
https://support.apple.com/en-us/HT211288, https://support.apple.com/en-us/HT211289; https://nvd.nist.gov/vuln/detail/CVE-2020-9934

support.apple.com ↗

support.apple.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-26258

CWE-78

D-Link

DIR-820L

Entry and action published by CISA

D-Link DIR-820L Remote Code Execution Vulnerability

D-Link DIR-820L contains an unspecified vulnerability in Device Name parameter in /lan.asp which allows for remote code execution.

requiredAction
The impacted product is end-of-life and should be disconnected if still in use.
notes
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10295; https://nvd.nist.gov/vuln/detail/CVE-2022-26258

supportannouncement.us.dlink.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-27593

CWE-610

QNAP

Photo Station

Entry and action published by CISA

QNAP Photo Station Externally Controlled Reference Vulnerability

Certain QNAP NAS running Photo Station with internet exposure contain an externally controlled reference to a resource vulnerability which can allow an attacker to modify system files. This vulnerability was observed being utilized in a Deadbolt ransomware campaign.

requiredAction
Apply updates per vendor instructions.
notes
https://www.qnap.com/en/security-advisory/qsa-22-24; https://nvd.nist.gov/vuln/detail/CVE-2022-27593

www.qnap.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Known
forensicTriage
No
CVE-2022-3075

CWE-20

Google

Chromium Mojo

Entry and action published by CISA

Google Chromium Mojo Insufficient Data Validation Vulnerability

Google Chromium Mojo contains an insufficient data validation vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

requiredAction
Apply updates per vendor instructions.
notes
https://chromereleases.googleblog.com/2022/09/stable-channel-update-for-desktop.html, https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-3075; https://nvd.nist.gov/vuln/detail/CVE-2022-3075

chromereleases.googleblog.com ↗

msrc.microsoft.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2020-28949

CWE-74

PEAR

Archive_Tar

Entry and action published by CISA

PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

PEAR Archive_Tar allows an unserialization attack because phar: is blocked but PHAR: is not blocked. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.

requiredAction
Apply updates per vendor instructions.
notes
https://pear.php.net/bugs/bug.php?id=27002, https://www.drupal.org/sa-core-2020-013, https://access.redhat.com/security/cve/cve-2020-28949; https://nvd.nist.gov/vuln/detail/CVE-2020-28949

pear.php.net ↗

www.drupal.org ↗

access.redhat.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2020-36193

CWE-22, CWE-59

PEAR

Archive_Tar

Entry and action published by CISA

PEAR Archive_Tar Improper Link Resolution Vulnerability

PEAR Archive_Tar Tar.php allows write operations with directory traversal due to inadequate checking of symbolic links. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.

requiredAction
Apply updates per vendor instructions.
notes
https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916, https://www.drupal.org/sa-core-2021-001, https://access.redhat.com/security/cve/cve-2020-36193; https://nvd.nist.gov/vuln/detail/CVE-2020-36193

github.com ↗

www.drupal.org ↗

access.redhat.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2021-31010

CWE-20, CWE-502

Apple

iOS, macOS, watchOS

Entry and action published by CISA

Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability

In affected versions of Apple iOS, macOS, and watchOS, a sandboxed process may be able to circumvent sandbox restrictions.

requiredAction
Apply updates per vendor instructions.
notes
https://support.apple.com/en-us/HT212804, https://support.apple.com/en-us/HT212805, https://support.apple.com/en-us/HT212806, https://support.apple.com/en-us/HT212807, https://support.apple.com/en-us/HT212824; https://nvd.nist.gov/vuln/detail/CVE-2021-31010

support.apple.com ↗

support.apple.com ↗

support.apple.com ↗

support.apple.com ↗

support.apple.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2021-38406

CWE-787

Delta Electronics

DOPSoft 2

Entry and action published by CISA

Delta Electronics DOPSoft 2 Improper Input Validation Vulnerability

Delta Electronics DOPSoft 2 lacks proper validation of user-supplied data when parsing specific project files (improper input validation) resulting in an out-of-bounds write that allows for code execution.

requiredAction
The impacted product is end-of-life and should be disconnected if still in use.
notes
https://www.cisa.gov/uscert/ics/advisories/icsa-21-252-02; https://nvd.nist.gov/vuln/detail/CVE-2021-38406

www.cisa.gov ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2021-39226

CWE-287

Grafana Labs

Grafana

Entry and action published by CISA

Grafana Authentication Bypass Vulnerability

Grafana contains an authentication bypass vulnerability that allows authenticated and unauthenticated users to view and delete all snapshot data, potentially resulting in complete snapshot data loss.

requiredAction
Apply updates per vendor instructions.
notes
https://grafana.com/blog/2021/10/05/grafana-7.5.11-and-8.1.6-released-with-critical-security-fix/; https://nvd.nist.gov/vuln/detail/CVE-2021-39226

grafana.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-2294

CWE-122

WebRTC

WebRTC

Entry and action published by CISA

WebRTC Heap Buffer Overflow Vulnerability

WebRTC, an open-source project providing web browsers with real-time communication, contains a heap buffer overflow vulnerability that allows an attacker to perform shellcode execution. This vulnerability impacts web browsers using WebRTC including but not limited to Google Chrome.

requiredAction
Apply updates per vendor instructions.
notes
https://groups.google.com/g/discuss-webrtc/c/5KBtZx2gvcQ; https://nvd.nist.gov/vuln/detail/CVE-2022-2294

groups.google.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Known
forensicTriage
No
CVE-2022-22963

CWE-94

VMware Tanzu

Spring Cloud

Entry and action published by CISA

VMware Tanzu Spring Cloud Function Remote Code Execution Vulnerability

When using routing functionality in VMware Tanzu's Spring Cloud Function, it is possible for a user to provide a specially crafted SpEL as a routing-expression that may result in remote code execution and access to local resources.

requiredAction
Apply updates per vendor instructions.
notes
https://tanzu.vmware.com/security/cve-2022-22963; https://nvd.nist.gov/vuln/detail/CVE-2022-22963

tanzu.vmware.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-24112

CWE-290

Apache

APISIX

Entry and action published by CISA

Apache APISIX Authentication Bypass Vulnerability

Apache APISIX contains an authentication bypass vulnerability that allows for remote code execution.

requiredAction
Apply updates per vendor instructions.
notes
https://lists.apache.org/thread/lcdqywz8zy94mdysk7p3gfdgn51jmt94; https://nvd.nist.gov/vuln/detail/CVE-2022-24112

lists.apache.org ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-24706

CWE-1188

Apache

CouchDB

Entry and action published by CISA

Apache CouchDB Insecure Default Initialization of Resource Vulnerability

Apache CouchDB contains an insecure default initialization of resource vulnerability which can allow an attacker to escalate to administrative privileges.

requiredAction
Apply updates per vendor instructions.
notes
https://lists.apache.org/thread/w24wo0h8nlctfps65txvk0oc5hdcnv00; https://nvd.nist.gov/vuln/detail/CVE-2022-24706

lists.apache.org ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-26352

CWE-22, CWE-138

dotCMS

dotCMS

Entry and action published by CISA

dotCMS Unrestricted Upload of File Vulnerability

dotCMS ContentResource API contains an unrestricted upload of file with a dangerous type vulnerability that allows for directory traversal, in which the file is saved outside of the intended storage location. Exploitation allows for remote code execution.

requiredAction
Apply updates per vendor instructions.
notes
https://www.dotcms.com/security/SI-62; https://nvd.nist.gov/vuln/detail/CVE-2022-26352

www.dotcms.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Known
forensicTriage
No
CVE-2022-0028

CWE-940

Palo Alto Networks

PAN-OS

Entry and action published by CISA

Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability

A Palo Alto Networks PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS) attacks.

requiredAction
Apply updates per vendor instructions.
notes
https://security.paloaltonetworks.com/CVE-2022-0028; https://nvd.nist.gov/vuln/detail/CVE-2022-0028

security.paloaltonetworks.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2017-15944

Palo Alto Networks

PAN-OS

Entry and action published by CISA

Palo Alto Networks PAN-OS Remote Code Execution Vulnerability

Palo Alto Networks PAN-OS contains multiple, unspecified vulnerabilities which can allow for remote code execution when chained.

requiredAction
Apply updates per vendor instructions.
notes
https://security.paloaltonetworks.com/CVE-2017-15944; https://nvd.nist.gov/vuln/detail/CVE-2017-15944

security.paloaltonetworks.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-21971

CWE-824

Microsoft

Windows

Entry and action published by CISA

Microsoft Windows Runtime Remote Code Execution Vulnerability

Microsoft Windows Runtime contains an unspecified vulnerability that allows for remote code execution.

requiredAction
Apply updates per vendor instructions.
notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971; https://nvd.nist.gov/vuln/detail/CVE-2022-21971

msrc.microsoft.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-22536

CWE-444

SAP

Multiple Products

Entry and action published by CISA

SAP Multiple Products HTTP Request Smuggling Vulnerability

SAP NetWeaver Application Server ABAP, SAP NetWeaver Application Server Java, ABAP Platform, SAP Content Server and SAP Web Dispatcher allow HTTP request smuggling. An unauthenticated attacker can prepend a victim's request with arbitrary data, allowing for function execution impersonating the victim or poisoning intermediary Web caches.

requiredAction
Apply updates per vendor instructions.
notes
SAP users must have an account in order to login and access the patch. https://accounts.sap.com/saml2/idp/sso; https://nvd.nist.gov/vuln/detail/CVE-2022-22536

accounts.sap.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-26923

CWE-295

Microsoft

Active Directory

Entry and action published by CISA

Microsoft Active Directory Domain Services Privilege Escalation Vulnerability

An authenticated user could manipulate attributes on computer accounts they own or manage, and acquire a certificate from Active Directory Certificate Services that would allow for privilege escalation to SYSTEM.

requiredAction
Apply updates per vendor instructions.
notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-26923; https://nvd.nist.gov/vuln/detail/CVE-2022-26923

msrc.microsoft.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-2856

CWE-20

Google

Chromium Intents

Entry and action published by CISA

Google Chromium Intents Insufficient Input Validation Vulnerability

Google Chromium Intents contains an insufficient validation of untrusted input vulnerability that allows a remote attacker to browse to a malicious website via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

requiredAction
Apply updates per vendor instructions.
notes
https://chromereleases.googleblog.com/2022/08/stable-channel-update-for-desktop_16.html; https://nvd.nist.gov/vuln/detail/CVE-2022-2856

chromereleases.googleblog.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-32893

CWE-20, CWE-787

Apple

iOS and macOS

Entry and action published by CISA

Apple iOS and macOS Out-of-Bounds Write Vulnerability

Apple iOS and macOS contain an out-of-bounds write vulnerability that could allow for remote code execution when processing malicious crafted web content.

requiredAction
Apply updates per vendor instructions.
notes
https://support.apple.com/en-gb/HT213412, https://support.apple.com/en-gb/HT213413; https://nvd.nist.gov/vuln/detail/CVE-2022-32893

support.apple.com ↗

support.apple.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-32894

CWE-20, CWE-787

Apple

iOS and macOS

Entry and action published by CISA

Apple iOS and macOS Out-of-Bounds Write Vulnerability

Apple iOS and macOS contain an out-of-bounds write vulnerability that could allow an application to execute code with kernel privileges.

requiredAction
Apply updates per vendor instructions.
notes
https://support.apple.com/en-gb/HT213412, https://support.apple.com/en-gb/HT213413; https://nvd.nist.gov/vuln/detail/CVE-2022-32894

support.apple.com ↗

support.apple.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Unknown
forensicTriage
No
CVE-2022-27925

CWE-22

Synacor

Zimbra Collaboration Suite (ZCS)

Entry and action published by CISA

Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability

Synacor Zimbra Collaboration Suite (ZCS) contains flaw in the mboximport functionality, allowing an authenticated attacker to upload arbitrary files to perform remote code execution. This vulnerability was chained with CVE-2022-37042 which allows for unauthenticated remote code execution.

requiredAction
Apply updates per vendor instructions.
notes
https://blog.zimbra.com/2022/08/authentication-bypass-in-mailboximportservlet-vulnerability/; https://nvd.nist.gov/vuln/detail/CVE-2022-27925

blog.zimbra.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Known
forensicTriage
No
CVE-2022-37042

CWE-23

Synacor

Zimbra Collaboration Suite (ZCS)

Entry and action published by CISA

Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability

Synacor Zimbra Collaboration Suite (ZCS) contains an authentication bypass vulnerability in MailboxImportServlet. This vulnerability was chained with CVE-2022-27925 which allows for unauthenticated remote code execution.

requiredAction
Apply updates per vendor instructions.
notes
https://blog.zimbra.com/2022/08/authentication-bypass-in-mailboximportservlet-vulnerability/; https://nvd.nist.gov/vuln/detail/CVE-2022-37042

blog.zimbra.com ↗

nvd.nist.gov ↗

dateAdded
dueDate
knownRansomwareCampaignUse
Known
forensicTriage
No

An old identifier can enter the catalogue recently

CVE-2015-5477, associated with ISC BIND in this snapshot, has identifier year 2015 and dateAdded 8 October 2026. These dates answer different questions. The entry calls for following vendor instructions; it does not establish your BIND version, exposure or installation of a fix.

From a public signal to a documented decision

  1. Qualify the match

    Keep the CVE, source and date, then establish product, version, embedded component and exposure. An SBOM may locate a component without proving its runtime condition.

  2. Read the action at its source

    Open the vendor advisory and updates. Separate updating, mitigation, discontinuing a product and searching for compromise evidence; a patch does not replace these other decisions.

  3. Document the change

    Assign an owner, prepare rollback and verify dependencies. A mitigation remains a scoped measure with an explicit validity period.

  4. Verify the resulting state

    Retain an observed version, checked configuration and service test. Closing a task needs evidence concerning the actual asset, beyond a console status.

Source release : · Documentary review :

CISA KEV data reused under CC0 1.0. Reuse implies no CISA affiliation or endorsement and grants no right to use the CISA logo or DHS seal.

Reference details · CISA KEV

How we publish this official snapshot

The copy is identified by its catalogue version, dateReleased, official mirror commit and source-file digest. CISA publication, GitHub synchronisation and our review are distinct events. Aggregates are computed from the retained entries; no visitor inventory collection or vulnerability scan takes place.

catalogVersion
2026.11.06
dateReleased
GitHub commit
e5b3a9b25050a8da26c96266c5bfe438ee0bdebc ·
SHA-256
47e0406b2be5a40420eff66f3d90e83eb8883dae6ff4d08e1b2a942c366f6cc2

Counters describe this snapshot only. They do not measure attack counts, vulnerability prevalence or an organisation’s risk. Distinct vendorProject labels are counted exactly as published, without merging aliases or treating them as distinct companies.

Explore the catalogue and method →

Source release : · Documentary review :

CISA KEV data reused under CC0 1.0. Reuse implies no CISA affiliation or endorsement and grants no right to use the CISA logo or DHS seal.

Official references

References consulted: . The method and worksheet propose checks to adapt to your context; they do not constitute certification.