CVE-2026-20920: Win32k Elevation of Privilege Vulnerability
This Microsoft advisory covers CVE-2026-20920 in Windows Server 2022, 23H2 Edition (Server Core installation).
- CVE-2026-20920
Key facts
- Vendor rating
- High, CVSS 7.8
- CISA KEV
- Not listed (catalogue checked )
- Affected
- Windows 11 version 23H2 10.0.22631.0 before 10.0.22631.6491; Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.6491; Windows Server 2022 10.0.20348.0 before 10.0.20348.4648 and 1 more below
- Fixed in
- 10.0.22631.6491, 10.0.20348.4648, 10.0.25398.2092
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
Affected products named by the advisory: Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation).
Text from the source record.
- Windows 11 version 23H2 10.0.22631.0 before 10.0.22631.6491
- Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.6491
- Windows Server 2022 10.0.20348.0 before 10.0.20348.4648
- Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 before 10.0.25398.2092
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-20920
Upgrade to a fixed release named by Microsoft:
- 10.0.22631.6491
- 10.0.20348.4648
- 10.0.25398.2092
End-of-life dates for Windows Server
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