New Windows Defender ShieldCrash 0-Day Bypasses Microsoft Patch to Read Files as SYSTEM

A newly published ShieldCrash proof of concept from researcher MSNightmare claims that Microsoft Defender remains vulnerable to an arbitrary file-read flaw, despite Microsoft’s earlier fix for ShieldBreak, tracked as CVE-2026-69414. The researcher says the issue could let a local attacker make Defender read files with SYSTEM-level privileges on fully updated, supported Windows systems. According to […] The post New Windows Defender ShieldCrash 0-Day Bypasses Microsoft Patch to Read Files as SYSTEM appeared first on Cyber Security News.

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