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CVE Number Vulnerability Product Severity Date
CVE-2026-41096 Windows DNS Client Remote Code Execution Vulnerability Windows 11, Windows Server Critical 29-05-2026

Technical Information

An unauthorized attacker could exploit a heap-based buffer overflow vulnerability in Microsoft Windows DNS to perform remote code execution by sending a specially crafted DNS response that causes memory corruption in the DNS Client and allows arbitrary code to run on the affected system.

Patch release date: May 12, 2026
Further information on this vulnerability is available at : CVE-2026-41096

Affected Software

Windows Server 2025 (Server Core installation),
Windows 11 Version 25H2 for ARM64-based Systems,
Windows 11 Version 25H2 for x64-based Systems,
Windows 11 Version 23H2 for ARM64-based Systems,
Windows 11 Version 23H2 for x64-based Systems,
Windows Server 2022, 23H2 Edition (Server Core installation),
Windows 11 Version 24H2 for ARM64-based Systems,
Windows 11 Version 24H2 for x64-based Systems,
Windows Server 2025,
Windows 11 version 26H1 for x64-based Systems,
Windows 11 Version 26H1 for ARM64-based Systems