Microsoft Addresses RoguePlanet Defender Vulnerability (CVE-2026-50656) with Privilege Escalation Fix

Microsoft released a patch for the RoguePlanet vulnerability (CVE-2026-50656) in its Defender antivirus software, which allows privilege escalation to SYSTEM level. The update is automatically applied through Microsoft's routine security maintenance, addressing a critical flaw disclosed by researcher Chaotic Eclipse.

Microsoft has released security updates for a Defender vulnerability known as RoguePlanet, nearly a month after details of the flaw became public.

The vulnerability, tracked as CVE-2026-50656 (CVSS score: 7.8), is a privilege escalation issue in the Microsoft Malware Protection Engine ("mpengine.dll"), which provides scanning, detection, and cleaning capabilities for its antivirus and

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