RedSun: System user access on Win 11/10 and Server with the April 2026 Update

April 15, 2026 · airhangerf15

URL: https://github.com/Nightmare-Eclipse/RedSun

“RedSun grants SYSTEM-level access on fully patched Windows 11/10 and Server installs.”

Microsoft shipped an April update with a privilege escalation that works on every supported Windows version. This is not a clever zero-day chained through five components. It is one bug. The Windows kernel team needs to explain what their review process actually does.