CVE-2026-20810

CVSS Score & Metrics

Base Score

7.8 / 10

Vector String

                                        CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H                                    

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

Published Date

January 13, 2026

Last Modified

January 14, 2026

CWE ID

CWE-590

Source

NVD

Vendor

microsoft

Product

windows_10_1809