CVE-2026-21245 | Microsoft Windows 11 24H2/11 25H2/11 26H1/Server 2025 Kernel heap-based overflow
A vulnerability, which was classified as critical, was found in Microsoft Windows 11 24H2/11 25H2/11 26H1/Server 2025. This affects an unknown part of the component Kernel. The manipulation results in heap-based buffer overflow.
This vulnerability is known as CVE-2026-21245. Attacking locally is a requirement. No exploit is available.
It is best practice to apply a patch to resolve this issue.