Microsoft working on patch for RoguePlanet Defender zero-day (CVE-2026-50656)

Microsoft has acknowledged the local elevation of privilege issue in Microsoft Defender that can be triggered via the “RoguePlanet” exploit, and is “working to provide a high quality security update that addresses this vulnerability.” The vulnerability, which has been assigned the CVE-2026-50656 identifier, stems from improper link resolution before file access, and can be exploited in low complexity attacks by authenticated attackers, with no user interaction required.