CVE-2026-66799 | Microsoft Windows up to Server 2025 Key Guard buffer overflow

August 12, 2026 Yanac

A vulnerability marked as very critical has been reported in Microsoft Windows. This affects an unknown function of the component Key Guard. The manipulation leads to buffer overflow.

This vulnerability is uniquely identified as CVE-2026-66799. Local access is required to approach this attack. No exploit exists.

It is recommended to apply a patch to fix this issue.VulDB Recent EntriesRead More