CVE-2026-20810
7.8HIGHFree of memory not on the heap in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Published: 1/13/2026Updated: 1/14/2026
Description
Free of memory not on the heap in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
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Affected Products
microsoftwindows_10_1809
microsoftwindows_10_1809
microsoftwindows_10_21h2
microsoftwindows_10_22h2
microsoftwindows_server_2019