CVE-2026-21238 | Microsoft Windows up to Server 2025 Ancillary Function Driver for WinSock access control
A vulnerability identified as critical has been detected in Microsoft Windows. The affected element is an unknown function of the component Ancillary Function Driver for WinSock. The manipulation leads to improper access controls.
This vulnerability is listed as CVE-2026-21238. The attack must be carried out locally. There is no available exploit.
It is recommended to apply a patch to fix this issue.