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In brief
- 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.
Timeline
5 sourcesTimeline
- First detected
BleepingComputer · EN · Security advisory
New Microsoft Defender 'ShieldCrash' zero-day grants SYSTEM access - New coverage
Security Affairs · EN · Media
Chaotic Eclipse Released ShieldCrash, A PoC For Microsoft Defender Zero-Day - New coverage
Cyber Kendra · EN · Security advisory
ShieldCrash Zero-Day Bypasses Microsoft's ShieldBreak Patch - New coverage
The Register · EN · Media
Serial Microsoft 0-day hunter drops yet another Defender exploit - New coverage
SecurityWeek · EN · Security advisory
New ‘ShieldCrash’ Zero-Day Exploit Targets Microsoft Defender
Sources
5 sources
This brief brings together multiple sources and is presented in this edition language. Source language: EN.
SecurityWeekEN · Security advisory · 36 d agoNew ‘ShieldCrash’ Zero-Day Exploit Targets Microsoft DefenderRead original ↗Cyber KendraEN · Security advisory · 36 d agoShieldCrash Zero-Day Bypasses Microsoft's ShieldBreak PatchRead original ↗BleepingComputerEN · Security advisory · 37 d agoNew Microsoft Defender 'ShieldCrash' zero-day grants SYSTEM accessRead original ↗The RegisterEN · Media · 36 d agoSerial Microsoft 0-day hunter drops yet another Defender exploitRead original ↗