CVE-2026-83839 | Microsoft Windows up to Server 2025 Hyper-V toctou

October 14, 2026 Yanac

A vulnerability marked as very critical has been reported in Microsoft Windows. This affects an unknown function of the component Hyper-V. Performing a manipulation results in time-of-check time-of-use.

This vulnerability is identified as CVE-2026-83839. The attack is only possible with local access. There is not any exploit available.

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