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Microsoft Security Response CenterCVE-2026-108438

Microsoft Office Word Information Disclosure Vulnerability

HighVendor CVSS 6.5 / 10 1 CVE Published Oct 15, 2026 at 7:00 AM UTC

Summary

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

Products covered

  • Microsoft 365 Apps for Enterprise for 64-bit Systems

  • Microsoft 365 Apps for Enterprise for 32-bit Systems

  • Microsoft Office LTSC for Mac 2021

  • Microsoft Office LTSC for Mac 2024

  • Microsoft Office 365 for Mac

Remediation

Release Notes

Vendor-listed fixes

  • https://aka.ms/OfficeSecurityReleases

  • 16.114.26101123

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.