← All advisories

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 1809cpe-rescue
Range: 10.0.17763.0
Microsoft/Windows 10 1607cpe-rescue2 versions
10.0.19044.0+ 1 more
- (no CPE)range: 10.0.19044.0
- (no CPE)range: 10.0.19045.0
Microsoft/Windows Server 2019cpe-rescue
Range: 10.0.17763.0
Microsoft/Windows Server 2019 (Server Core installation)v5
Range: 10.0.17763.0

Patches

Vulnerability mechanics

References

1

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

News mentions

0

No linked articles in our index yet.