What is CVE-2026-108438?

CVE-2026-108438 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Office Word Information Disclosure Vulnerability

Which CVE IDs does CVE-2026-108438 cover?

CVE-2026-108438 covers the following CVE IDs: CVE-2026-108438. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-108438?

CVE-2026-108438 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-108438?

CVE-2026-108438 affects 5 products, including: Microsoft 365 Apps for Enterprise for 32-bit Systems; Microsoft 365 Apps for Enterprise for 64-bit Systems; Microsoft Office 365 for Mac; Microsoft Office LTSC for Mac 2021; Microsoft Office LTSC for Mac 2024.

CVE-2026-108438HighCVSS 6.5

Microsoft Office Word Information Disclosure Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 15, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-108438 →

📋 Description

Use after free in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.

🎯 Affected products5

Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Office 365 for Mac
Microsoft Office LTSC for Mac 2021
Microsoft Office LTSC for Mac 2024

✅ Remediation

KBRelease Notes (Security Update) — fixed build https://aka.ms/OfficeSecurityReleases KBRelease Notes (Security Update) — fixed build 16.114.26101123

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108438
patchhttps://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
patchhttps://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac