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Windows Defender 0day Vulnerability
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README.md

ShieldCrash

Windows Defender 0day Vulnerability

Microsoft has failed to properly patch ShieldBreak CVE-2026-69414, under specific conditions it is still possible to trigger the exact same problem that was caused by ShieldBreak. While Microsoft fixed several things to prevent re-exploiting the issue, they missed a spot where ShieldBreak can still be exploited.

This PoC demonstrates an arbitrary file read as SYSTEM with September 2026, all supported windows versions are affected.

image

I might rework this later into a full SYSTEM PoC but for now I'm dropping this skeleton PoC because I'm feeling a bit lazy.