Windows Win32k Elevation of Privilege Vulnerability

• Microsoft Office LTSC for Mac 2021

• Microsoft Office LTSC for Mac 2024

• Microsoft Office 365 for Mac

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 27, 2026 at 9:40 PM UTC
   • Added affected products: Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024.
   • Removed affected products: Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for....
   • Added fixed versions: 16.112.26090911.
   • Removed fixed versions: 6.2.9200.26349, 6.3.9600.23398, 10.0.14393.9512, 10.0.17763.9245, 10.0.19044.7725.
   • The vendor changed its remediation guidance.
2. Sep 27, 2026 at 11:11 PM UTC
   • Added fixed versions: 6.3.9600.23398.
   • Removed fixed versions: 6.3.9600.23397.

1. Sep 8, 2026 at 7:00 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 8, 2026 at 7:15 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 28, 2026 at 3:45 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.