Microsoft Defender 'RoguePlanet' zero-day grants SYSTEM privileges

A security researcher known as Nightmare Eclipse published a proof-of-concept for a Microsoft Defender zero-day called "RoguePlanet" which can spawn a SYSTEM-level command prompt on fully patched Windows 10/11 via a race condition; ThreatLocker reproduced the exploit and demonstrated it, and the researcher claims additional RCE scenarios were previously developed before Microsoft mitigations.