Nightmare-Eclipse Drops ShieldBreak Windows Defender 0-day Vulnerability

The prolific and controversial security researcher known as Nightmare-Eclipse (also tracked under the alias Chaotic Eclipse) has released a ninth Windows zero-day exploit called ShieldBreak, and this time the target is Microsoft’s own fix. ShieldBreak demonstrates a complete bypass of the patch Microsoft shipped for RoguePlanet, the Windows Defender elevation-of-privilege flaw tracked as CVE-2026-50656, proving […] The post Nightmare-Eclipse Drops ShieldBreak Windows Defender 0-day Vulnerability appeared first on Cyber Security News.