CVE-2026-69775

Windows DWM Core Library Elevation of Privilege Vulnerability

CVE-2026-69775 is fixed in 4 products on 1 platform, first by KB5122880, released September 8, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.1

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0057

47th percentile

<p>Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 23H2 for ARM64-based Systems	22631.7582	KB5122880	Sep 8, 2026
Windows 11 Version 23H2 for x64-based Systems	22631.7582	KB5122880	Sep 8, 2026
Windows Server 2025	26100.33438	KB5122871	Sep 8, 2026
Windows Server 2025 (Server Core installation)	26100.33438	KB5122871	Sep 8, 2026

Details

Published
September 8, 2026
Weakness
Use After Free
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69775

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