ShieldBreak: Making Windows Defender Write Your Payload to System32

On 12 August 2026 Nightmare Eclipse published ShieldBreak, a proof of concept that defeats Microsoft's July fix for CVE-2026-50656 (RoguePlanet) and escalates a standard user to NT AUTHORITYSYSTEM on fully patched Windows 11 25H2 and Server 2025. This is a line-by-line walkthrough of the chain: registering a fake cloud storage provider so the attacker controls what Defender reads, using Object…