Cybersecurity · 44 views
New Microsoft Defender 'ShieldCrash' zero-day grants SYSTEM access
An anonymous security researcher known as Nightmare Eclipse has released a new Microsoft Defender zero-day exploit named " ShieldCrash " right after Microsoft rolled out its September 2026 Patch Tuesday security updates.
Summary
An anonymous security researcher known as Nightmare Eclipse has released a new Microsoft Defender zero-day exploit named " ShieldCrash " right after Microsoft rolled out its September 2026 Patch Tuesday security updates. ShieldCrash is described as a bypass for the ShieldBreak Defender privilege escalation flaw patched on Thursday , which itself bypassed RoguePlanet , another Defender flaw disclosed in June and patched by Microsoft in July .
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