CVE-2026-20842 | Microsoft Windows up to Server 2025 DWM Core Library use after free

January 13, 2026 Yanac

A vulnerability, which was classified as critical, has been found in Microsoft Windows up to Server 2025. The affected element is an unknown function of the component DWM Core Library. The manipulation leads to use after free.

This vulnerability is referenced as CVE-2026-20842. The attack can only be performed from a local environment. No exploit is available.

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