Name: CVE-2026-20810: Free of Memory not on the Heap
Creator: Rapid7
Published: 2026-01-13T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-20810, CVSS 7.8, EPSS 0.00493

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

CVSS Details

CVSS 3.1 Base Score: 7.8
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Microsoft Windows	—	2026-01 Cumulative Update for Microsoft Windows 10, version 21H2 (KB5073724)2026-01 Cumulative Update for Microsoft Windows 10, version 22H2 (KB5073724)2026-01 Cumulative Update for Microsoft Windows 10, version 1809 (KB5073723)2026-01 Cumulative Update for Microsoft Windows Server 2019, version 1809 (KB5073723)	Jan 13, 2026	Jan 13, 2026

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CVSS Details

Covered by Rapid7

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