Microsoft fixes RoguePlanet zero-day in Defender

Microsoft issued a security update that fixes the zero-day vulnerability known as RoguePlanet in Microsoft Defender. RoguePlanet is tracked as CVE-2026-50656, a Microsoft Defender elevation of privilege EoP vulnerability. As we reported last month, if successfully exploited, RoguePlanet can allow...

EUVD-2026-37141

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ". We are working to provide a high quality security update that addresses this vulnerability. We will provide information in this CVE when the...

PT-2026-49756

Name of the Vulnerable Software and Affected Versions Microsoft Malware Protection Engine affected versions not specified Windows 11 25H2 Windows Server 2025 Windows 10 affected versions not specified Description An elevation of privilege flaw, publicly known as RoguePlanet, exists in the Microso...