CVE-2026-97792 | Microsoft Windows up to Server 2025 Container Isolation FS Filter Driver unionfs.sys access control

October 14, 2026 Yanac

A vulnerability has been found in Microsoft Windows up to Server 2025 and classified as very critical. Impacted is an unknown function of the file unionfs.sys of the component Container Isolation FS Filter Driver. The manipulation leads to improper access controls.

This vulnerability is referenced as CVE-2026-97792. The attack can only be performed from a local environment. No exploit is available.

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