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Vulnerability IntelligenceMICROSOFT-CVE-2026-20810

MICROSOFT-CVE-2026-20810

HIGH7.8

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Published Jan 13, 2026

Modified Yesterday

Details

Free of memory not on the heap in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20810

CVSS Analysis

CVSS v2.0

7.8

Upstream

Ecosystems

Timeline

PublishedJan 13, 2026

ModifiedApr 30, 2026

MICROSOFT-CVE-2026-20810 | Mondoo Vulnerability Intelligence