CVE-2026-70307 | Microsoft Windows up to Server 2025 Ancillary Function Driver for WinSock use after free

A vulnerability was found in Microsoft Windows. It has been classified as very critical. This affects an unknown function of the component Ancillary Function Driver for WinSock. Performing a manipulation results in use after free.

This vulnerability is cataloged as CVE-2026-70307. The attack must be initiated from a local position. There is no exploit available.

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