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CRITICAL Vulnerabilities

Microsoft ships patch for RoguePlanet Defender zero-day after June 2026

Source headline: Microsoft patches RoguePlanet Defender zero-day vulnerability

Threat level Critical
Signal strength 75/100
Source confidence 1 source
Published 6 days ago

Intelligence Summary

Microsoft released a security update to fix a Defender zero-day vulnerability known as RoguePlanet. The issue was disclosed after the June 2026 Patch Tuesday cycle. Successful exploitation could allow attackers to bypass or undermine Microsoft Defender protections on affected systems. Users should apply the latest Microsoft security patches as soon as possible. Organizations running Defender should also review their update status and monitor for related suspicious activity.

Recommended Action

Prioritize immediate review, validate exposure, and patch or mitigate affected systems.

Topics

#defender #endpoint-security #microsoft #rogueplanet #zero-day #patch-tuesday
Original reporting BleepingComputer Microsoft patches RoguePlanet Defender zero-day vulnerability
Open original source

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