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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-56176

Windows Win32k Elevation of Privilege Vulnerability

Description

Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Microsoft Microsoft Office 365 for Mac

  • 1.0.0 to < 16.111.26071215affected

Microsoft Microsoft Office for Android

  • 16.0.1 to < 16.0.20228.20042affected

Microsoft Microsoft Office LTSC for Mac 2021

  • 16.0.1 to < 16.111.26071215affected

Microsoft Microsoft Office LTSC for Mac 2024

  • 16.0.0 to < 16.111.26071215affected

Microsoft Windows 10 Version 1607

  • 10.0.14393.0 to < 10.0.14393.9339affected

Microsoft Windows 10 Version 1809

  • 10.0.17763.0 to < 10.0.17763.9020affected

Microsoft Windows 10 Version 21H2

  • 10.0.19044.0 to < 10.0.19044.7548affected

Microsoft Windows 10 Version 22H2

  • 10.0.19045.0 to < 10.0.19045.7548affected

Microsoft Windows 11 Version 24H2

  • 10.0.26100.0 to < 10.0.26100.8875affected

Microsoft Windows 11 Version 25H2

  • 10.0.26200.0 to < 10.0.26200.8875affected

Microsoft Windows 11 version 26H1

  • 10.0.28000.0 to < 10.0.28000.2525affected

Microsoft Windows Server 2012

  • 6.2.9200.0 to < 6.2.9200.26226affected

Microsoft Windows Server 2012 (Server Core installation)

  • 6.2.9200.0 to < 6.2.9200.26226affected

Microsoft Windows Server 2012 R2

  • 6.3.9600.0 to < 6.3.9600.23291affected

Microsoft Windows Server 2012 R2 (Server Core installation)

  • 6.3.9600.0 to < 6.3.9600.23291affected

Microsoft Windows Server 2016

  • 10.0.14393.0 to < 10.0.14393.9339affected

Microsoft Windows Server 2016 (Server Core installation)

  • 10.0.14393.0 to < 10.0.14393.9339affected

Microsoft Windows Server 2019

  • 10.0.17763.0 to < 10.0.17763.9020affected

Microsoft Windows Server 2019 (Server Core installation)

  • 10.0.17763.0 to < 10.0.17763.9020affected

Microsoft Windows Server 2022

  • 10.0.20348.0 to < 10.0.20348.5386affected

Microsoft Windows Server 2025

  • 10.0.26100.0 to < 10.0.26100.33158affected

Microsoft Windows Server 2025 (Server Core installation)

  • 10.0.26100.0 to < 10.0.26100.33158affected

References