ShieldCrash bypasses Microsoft Defender’s ShieldBreak fix to read files as SYSTEM

On September 9, 2026, researcher Chaotic Eclipse published ShieldCrash, a proof of concept that bypasses CVE-2026-69414 (ShieldBreak), the privilege-escalation flaw Microsoft claimed to have patched in Defender’s antimalware engine. Check your Malware Protection Engine version and treat the EDR itself as attack surface to monitor.