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CVE-2026-20810
HIGH7.8
Description
Free of memory not on the heap in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE Details
CVSS v3.1 Score7.8
SeverityHIGH
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorLOCAL
ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
Published1/13/2026
Last Modified1/14/2026
Sourcenvd
Honeypot Sightings0
Affected Products
microsoft:windows_10_1809microsoft:windows_10_21h2microsoft:windows_10_22h2microsoft:windows_server_2019
Weaknesses (CWE)
CWE-590
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20810(secure@microsoft.com)
IOC Correlations
No correlations recorded
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