CVE-2026-85908

Windows Graphics Component Elevation of Privilege Vulnerability

State: Published
Severity: 7.8 High
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Sep 4, 2026

Description

Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
Microsoft Office 365 for MacMicrosoft	1.0.0 to before 16.114.26101123Affected
Microsoft Office for AndroidMicrosoft	16.0.1 to before 16.0.20430.20000Affected
Microsoft Office LTSC for Mac 2021Microsoft	16.0.1 to before 16.114.26101123Affected
Microsoft Office LTSC for Mac 2024Microsoft	16.0.0 to before 16.114.26101123Affected
Windows 10 Version 1607Microsoft	10.0.14393.0 to before 10.0.14393.9612Affected
Windows 10 Version 1809Microsoft	10.0.17763.0 to before 10.0.17763.9376Affected
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.7807Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.7807Affected
Windows 11 version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7652Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7652Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.9711Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.9711Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.3231Affected
Windows 11 Version 26H2Microsoft	10.0.26300.0 to before 10.0.26300.9711Affected
Windows Server 2012Microsoft	6.2.9200.0 to before 6.2.9200.26434Affected
Windows Server 2012 (Server Core installation)Microsoft	6.2.9200.0 to before 6.2.9200.26434Affected
Windows Server 2012 R2Microsoft	6.3.9600.0 to before 6.3.9600.23470Affected
Windows Server 2012 R2 (Server Core installation)Microsoft	6.3.9600.0 to before 6.3.9600.23470Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.9612Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.9612Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.9376Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.9376Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.5761Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.33650Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.33650Affected

References

Windows Graphics Component Elevation of Privilege Vulnerabilityvendor-advisorypatch

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