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Unrated severityNVD Advisory· Published Jan 13, 2026· Updated Apr 1, 2026

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

CVE-2026-20810

Description

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

Affected products

5

Microsoft/Windows 10 Version 1809v5
Range: 10.0.17763.0
Microsoft/Windows 10 Version 21H2v5
Range: 10.0.19044.0
Microsoft/Windows 10 Version 22H2v5
Range: 10.0.19045.0
Microsoft/Windows Server 2019v5
Range: 10.0.17763.0
Microsoft/Windows Server 2019 (Server Core installation)v5
Range: 10.0.17763.0

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20810mitrevendor-advisorypatch

News mentions

0

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