CVE-2026-20860 | Microsoft Windows up to Server 2025 Ancillary Function Driver for WinSock type confusion

January 13, 2026 Yanac

A vulnerability, which was classified as critical, has been found in Microsoft Windows. This impacts an unknown function of the component Ancillary Function Driver for WinSock. This manipulation causes type confusion.

The identification of this vulnerability is CVE-2026-20860. The attack can only be executed locally. There is no exploit available.

Applying a patch is the recommended action to fix this issue.VulDB Recent EntriesRead More