Nightmare Eclipse drops ShieldBreak zero-day, US recruits cyber privateers, California bolstering cyber defenses
Windows Defender Zero-Day 'ShieldBreak,' California's AI Cyber Defense, and US 'Cyber Privateers'
A researcher known as Nightmare Eclipse published a new Windows zero-day called ShieldBreak that exploits Windows Defender to escalate from low-level access to full system control across Windows 10/11 (including 25H2) and Windows Server 2025, claiming it bypasses Microsoft's patch for their earlier RoguePlanet exploit; a public proof-of-concept app is available, Will Dormann verified it works, and Microsoft says it's investigating.
California Governor Gavin Newsom ordered an AI cyber defense…
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