cve 2026 55011

The cve 2026 55011 tag covers Microsoft’s fix for a remote code execution vulnerability in the Microsoft Malware Protection Engine. The issue affects the mpengine.dll component used by Microsoft Defender to scan, detect, and clean malicious content. Microsoft corrected the vulnerability by updating the engine from affected version 1.1.26050.11 to version 1.1.26060.3008, as described in a Microsoft Security Response Center advisory published July 14, 2026. Because Defender’s engine typically updates alongside security intelligence, most Windows systems should receive the correction automatically rather than through a conventional Windows Update package or a separate administrator-led installation.