msnightmare/shieldbreak

ShieldBreak is a proof of concept project that demonstrates a security flaw in Microsoft's Windows Defender software. According to the repository's README, Microsoft previously attempted to fix a known vulnerability called RoguePlanet, identified as CVE-2026-50656, but the patch was incomplete. This project shows that the original security hole remains accessible despite Microsoft's repair efforts. The project's author states that the proof of concept has been tested against recent versions of Windows 11, specifically the 25h2 release and the Canary test channel, as well as Windows Server 2025. The README claims a 100% success rate across those tested systems. The author also notes that Windows 10 and its corresponding server editions are not currently supported by this proof of concept, even though those older systems are also vulnerable to the same underlying issue. The README itself is extremely short. It provides only a brief summary of the vulnerability, a screenshot that appears to show the tool in operation, and a few sentences describing the tested operating systems and the claimed success rate. There are no installation instructions, usage guides, or technical breakdowns explaining how the bypass works. The repository does not include details about the method used or the specific mechanics of the vulnerability. Given the nature of the project, anyone reviewing this repository should understand that it deals with a live security weakness in widely used operating system protection software. The code demonstrates that a known problem was not fully resolved by the vendor. The README does not state whether the flaw has been reported to Microsoft through official security channels, nor does it indicate whether a proper fix is pending. The full README is longer than what was shown.