Researcher Demonstrates Bypass of Microsoft Defender's ShieldBreak Patch via ShieldCrash Vulnerability
A researcher has released a proof-of-concept (PoC) demonstrating a bypass of Microsoft Defender's ShieldBreak patch, exploiting the ShieldCrash vulnerability (CVE-2026-69414) with a CVSS score of 7.8. The PoC allows arbitrary file reads as SYSTEM, affecting all supported Windows versions, highlighting a flaw in Microsoft's mitigation efforts.
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 the researcher reported last month.
"Microsoft has failed to properly patch ShieldBreak CVE-2026-69414," Chaotic
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