Microsoft Office LTSC pour Mac 2024: contain code execution

Published · Updated · Digital strategy · 7 min read · By Cyber Intelligence Embassy

At a glance

Microsoft Office LTSC pour Mac 2024: remote code execution. This 2026-08-12 case examines 25 version entries and 89 CVEs, documented releases and checks suited to runtime platforms, using CERTFR-2026-AVI-1000.

This article discusses 2024. Verify information that may have changed before relying on it.

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In this article

Retrospective for 2026-08-12, compiled on 27 October 2026. The date identifies the day being analysed; source publication and revision dates are recorded below.

What this advisory changes in your environment

The starting point is CERTFR-2026-AVI-1000, published on 2026-08-12. Its scope includes Microsoft Office LTSC pour Mac 2024, Microsoft Outlook 2016 (édition 64 bits), Microsoft Office 2016 (édition 32 bits), Microsoft Excel 2016 (édition 32 bits), Microsoft Word 2016 (édition 32 bits), Microsoft PowerPoint 2016 (édition 64 bits), Microsoft Office LTSC pour Mac 2021, Microsoft Excel 2016 (édition 64 bits), Microsoft Office 2016 (édition 64 bits), Microsoft PowerPoint 2016 (édition 32 bits), Microsoft Office 365 pour Mac, Microsoft Word 2016 (édition 64 bits). Reported consequences are remote code execution, security control bypass, loss of confidentiality, privilege escalation. These statements apply to the advisory’s scope; they do not assign every consequence to every product or CVE.

This case contains 25 version entries; CVE identifier count: 89. Track remediation by component: a successful overall update does not demonstrate that Microsoft Office LTSC pour Mac 2024 and Microsoft Access 2016 (édition 64 bits) each received their respective fix.

Products and versions to examine

Reference
CERTFR-2026-AVI-1000
Source first published
2026-08-12
Latest source revision available for this day
2026-08-12
Named components
Microsoft Office LTSC pour Mac 2024, Microsoft Outlook 2016 (édition 64 bits), Microsoft Office 2016 (édition 32 bits), Microsoft Excel 2016 (édition 32 bits), Microsoft Word 2016 (édition 32 bits), Microsoft PowerPoint 2016 (édition 64 bits), Microsoft Office LTSC pour Mac 2021, Microsoft Excel 2016 (édition 64 bits), Microsoft Office 2016 (édition 64 bits), Microsoft PowerPoint 2016 (édition 32 bits), Microsoft Office 365 pour Mac, Microsoft Word 2016 (édition 64 bits), Microsoft Access 2016 (édition 32 bits), Microsoft Outlook 2016 (édition 32 bits), Microsoft Access 2016 (édition 64 bits)
CVE identifiers
CVE-2026-66807, CVE-2026-64911, CVE-2026-70310, CVE-2026-68814, CVE-2026-68799, CVE-2026-62842, CVE-2026-63526, CVE-2026-63517, CVE-2026-70313, CVE-2026-63527, CVE-2026-63518, CVE-2026-68817, CVE-2026-68808, CVE-2026-68801, CVE-2026-64915, CVE-2026-62882, CVE-2026-70327, CVE-2026-65664, CVE-2026-68794, CVE-2026-70316, CVE-2026-64910, CVE-2026-68798, CVE-2026-64914, CVE-2026-70319 … (+65)
ComponentPublished condition
Microsoft Office LTSC pour Mac 2024< 16.112.26081010
Microsoft Outlook 2016 (édition 64 bits)< 16.0.5565.1000
Microsoft Office 2016 (édition 32 bits)< 16.0.5565.1000
Microsoft Excel 2016 (édition 32 bits)< 16.0.5565.1001
Microsoft Word 2016 (édition 32 bits)< 16.0.5565.1000
Microsoft PowerPoint 2016 (édition 64 bits)< 16.0.5565.1001
Microsoft Office LTSC pour Mac 2021< 16.112.26081010
Microsoft Office 2016 (édition 32 bits)< 16.0.5565.1001
Microsoft Excel 2016 (édition 64 bits)< 16.0.5565.1001
Microsoft Office 2016 (édition 64 bits)< 16.0.5565.1001
Microsoft PowerPoint 2016 (édition 32 bits)< 16.0.5565.1001
Microsoft Office 365 pour Mac< 16.112.26081010
Microsoft Word 2016 (édition 64 bits)< 16.0.5565.1000
Microsoft Access 2016 (édition 32 bits)< 16.0.5565.1000
Microsoft Outlook 2016 (édition 32 bits)< 16.0.5565.1000
Microsoft Office 2016 (édition 64 bits)< 16.0.5565.1000
Microsoft Access 2016 (édition 64 bits)< 16.0.5565.1000

For Microsoft Office LTSC pour Mac 2024, the published condition is “< 16.112.26081010”. Compare the version actually loaded with that condition within its own release branch. A fix installed on another edition of Microsoft Office LTSC pour Mac 2024 does not close this case.

Mechanism and prerequisites

Code execution can give an attacker the permissions of the affected process. Check the service account and reachable network destinations. Component isolation can reduce lateral movement opportunities, but does not replace the fix.

For CERTFR-2026-AVI-1000, the retained documents do not provide a suitably dated primary CVE record to establish this case’s prerequisites. Required authentication, user interaction and active exploitation therefore remain unestablished here; they are not inferred from Microsoft Office LTSC pour Mac 2024 or the risk category alone.

Choose the appropriate intervention

  1. Locate Microsoft Office LTSC pour Mac 2024 instances, running releases and service owners. Record condition < 16.112.26081010 in the ticket alongside reference CERTFR-2026-AVI-1000.
  2. Compare the installed branch with the vendor’s Microsoft Office LTSC pour Mac 2024 release notes. Prepare the package for that branch and a dependent-service test, retaining the pre-change state.
  3. After changing Microsoft Office LTSC pour Mac 2024, capture the loaded version again and verify the workflow below. Any exception needs an owner, an exposure-reduction measure and an expiry date.

Verify the fix in a real workflow

Validation scenario to adapt for Microsoft Office LTSC pour Mac 2024: For Microsoft Office LTSC pour Mac 2024, capture the version loaded by the process or active kernel, then restart only as required by maintenance instructions. Check a dependent workflow and look for embedded copies in distributed images or executables. This is a proposed defensive check, not a claim that testing was performed against third-party systems.

Limit of case CERTFR-2026-AVI-1000: this analysis replaces neither vendor prerequisites nor investigation of your logs. Only documented versions are reproduced; no attack date or victim is invented.

Questions specific to this case

Which condition should be checked for Microsoft Office LTSC pour Mac 2024?

Advisory CERTFR-2026-AVI-1000 states: Microsoft Office LTSC pour Mac 2024 — < 16.112.26081010. Check the edition and running release; do not extend the published boundary to branches absent from the advisory.

Why not use one fix for Microsoft Office LTSC pour Mac 2024 and Microsoft Access 2016 (édition 64 bits)?

CERTFR-2026-AVI-1000 distinguishes these components within a scope containing 25 entries. Match each branch to its own update documentation and functional check.

What is still needed to assess Microsoft Office LTSC pour Mac 2024 exposure?

For Microsoft Office LTSC pour Mac 2024, establish the running version, the path to the component and process permissions. The sources retained for CERTFR-2026-AVI-1000 do not establish every prerequisite or active exploitation.

Sources and related reading

Practical guide : Prioritize vulnerabilities and verify remediation

Explore the decision addressed in this case

Complete source advisory inventory

The article table may be an extract. These lists contain every affected-system entry and CVE in the specified advisory revision. They are not an inventory of your assets and do not map every CVE to every product.

Official source · CERTFR-2026-AVI-1000
Advisory revision : · Checked on :

Affected systems · 25

Original French wording is retained to avoid ambiguous translations of version conditions.

  1. Microsoft Office LTSC pour Mac 2024 versions antérieures à 16.112.26081010
  2. Microsoft Outlook 2016 (édition 64 bits) versions antérieures à 16.0.5565.1000
  3. Microsoft Office 2016 (édition 32 bits) versions antérieures à 16.0.5565.1000
  4. Microsoft Excel 2016 (édition 32 bits) versions antérieures à 16.0.5565.1001
  5. Microsoft Word 2016 (édition 32 bits) versions antérieures à 16.0.5565.1000
  6. Microsoft PowerPoint 2016 (édition 64 bits) versions antérieures à 16.0.5565.1001
  7. Microsoft Office LTSC pour Mac 2021 versions antérieures à 16.112.26081010
  8. Microsoft Office LTSC 2024 pour éditions 64 bits
  9. Microsoft Office 2016 (édition 32 bits) versions antérieures à 16.0.5565.1001
  10. Microsoft Excel 2016 (édition 64 bits) versions antérieures à 16.0.5565.1001
  11. Microsoft Office LTSC 2021 pour éditions 32 bits
  12. Microsoft Office 2019 pour éditions 32 bits
  13. Microsoft 365 Apps pour Enterprise pour systèmes 32 bits
  14. Microsoft Office 2019 pour éditions 64 bits
  15. Microsoft Office 2016 (édition 64 bits) versions antérieures à 16.0.5565.1001
  16. Microsoft Office LTSC 2024 pour éditions 32 bits
  17. Microsoft PowerPoint 2016 (édition 32 bits) versions antérieures à 16.0.5565.1001
  18. Microsoft Office 365 pour Mac versions antérieures à 16.112.26081010
  19. Microsoft Word 2016 (édition 64 bits) versions antérieures à 16.0.5565.1000
  20. Microsoft Office LTSC 2021 pour éditions 64 bits
  21. Microsoft Access 2016 (édition 32 bits) versions antérieures à 16.0.5565.1000
  22. Microsoft Outlook 2016 (édition 32 bits) versions antérieures à 16.0.5565.1000
  23. Microsoft 365 Apps pour Enterprise pour systèmes 64 bits
  24. Microsoft Office 2016 (édition 64 bits) versions antérieures à 16.0.5565.1000
  25. Microsoft Access 2016 (édition 64 bits) versions antérieures à 16.0.5565.1000
CVE identifiers · 89