CVE-2026-20810

—

CVSS 3.1

7.8 high

EPSS

<1%p41

Published

Jan 13, 2026 (Jan 13, 2026)

Modified

Jun 17, 2026

Description

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

Vendors: microsoft
Products: windows 10 1809, windows 10 21h2, windows 10 22h2, windows server 2019
Weakness: CWE-590
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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