ShieldBreak Zero-Day PoC Claims Microsoft Defender Patch Bypass With SYSTEM Access

Security researcher Chaotic Eclipse released a proof-of-concept (PoC) detailing ShieldBreak, a new Microsoft zero-day vulnerability. This weakness is rooted in Microsoft Defender for Windows and demonstrates a patch bypass capability. The exploit targets CVE-2026-50656, which has a CVSS score of 7.8 and is also known as RoguePlanet.