Google: CVE-2026-111497 Buffer overflow vulnerability in the Brotli decoder
CVE-2026-111497
Summary
Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Products covered
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions
Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Office LTSC 2021 for 64-bit editions
Microsoft Office LTSC 2021 for 32-bit editions
Microsoft Office LTSC 2024 for 32-bit editions
Microsoft Office LTSC 2024 for 64-bit editions
Remediation
Click to Run
Vendor-listed fixes
https://aka.ms/OfficeSecurityReleases
CVEs in this advisory 1
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
- Confirmed at the source
Our collector saw this advisory during a later source check.