Windows CVE-2026-25179
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Improper validation of specified type of input in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows Ancillary Function Driver for WinSock in Windows Server 2025, 2022, and Windows 10 1809 contains insufficient input validation that allows authenticated local users to escalate privileges. An attacker with local access and valid credentials can exploit this vulnerability to gain elevated system permissions, though no patch is currently available. …
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RemediationAI
Within 24 hours: Inventory all Windows systems running affected WinSock versions and assess which have privileged user accounts requiring local access. Within 7 days: Implement network segmentation to restrict local access where possible, enforce least-privilege account policies, and disable unnecessary local user accounts. …
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