ShieldBreak: A Full Bypass of Microsoft’s Defender Patch

ShieldBreak is a proof-of-concept exploit chain, released August 12, 2026, that its author claims fully bypasses Microsoft’s July 2026 patch for CVE-2026-50656 (“RoguePlanet”), restoring the ability of a standard, unprivileged Windows user to escalate to NT AUTHORITY\SYSTEM [1][2]. Independent testing by security researcher Kevin Beaumont corroborated that the technique works on the current release of Windows 11, though he noted ShieldBreak achieves the same SYSTEM-level outcome through a mechanism entirely distinct from the original RoguePlanet flaw [2][5].

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ShieldBreak: A Full Bypass of Microsoft’s Defender Patch

Key Takeaways ShieldBreak is a proof-of-concept exploit chain, released August 12, 2026, that its author claims fully bypasses Microsoft’s July 2026 patch for CVE-2026-50656 (“RoguePlan…

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