Hunt or be Hunted: ShieldBreak Zero-Day
On August 11, 2026, a security researcher publicly released a proof-of-concept called ShieldBreak, a full bypass of Microsoft’s own July patch (RoguePlanet) for a Windows Defender privilege-escalation flaw, with a reported 100% success rate against Windows 11 25H2 and Windows Server 2025. No vendor fix existed for the bypass. The only real defense was whoever moved first.