What changed
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The security researcher known as Chaotic Eclipse has dropped a proof-of-concept (PoC) for yet another zero-day in Microsoft Defender. The vulnerability, codenamed ShieldCrash, is assessed to be a patch bypass for CVE-2026-69414 (CVSS score: 7.8), also called ShieldBreak, which...
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. [...]
The researcher Chaotic Eclipse released ShieldCrash, a PoC exploit for a Microsoft Defender Zero-Day vulnerability. Security researcher Chaotic Eclipse, also known as INFINITE NIGHTMARE, MSNightmare and Nightmare-Eclipse, released a new zero-day exploit targeting Microsoft Def...
The exploit provides full System privileges on Windows machines running the September 2026 patches. The post New ‘ShieldCrash’ Zero-Day Exploit Targets Microsoft Defender appeared first on SecurityWeek.
ShieldCrash PoC: Microsoft Defender Fix Bypass Microsoft recently fixed CVE-2026-69414 (ShieldBreak) , a High-severity elevation-of-privilege vulnerability in the Microsoft Malware Protection Engine. Now, Nightmare Eclip
The disgruntled researcher continued their vendetta against Microsoft by publishing yet another zero-day exploit for Windows Defender.