CVE-2026-50656 “RoguePlanet” in Microsoft Defender: what’s known and how to prepare

Originally published at: CVE-2026-50656 “RoguePlanet” in Microsoft Defender: what’s known and how to prepare - ToolsLib Blog

Microsoft is preparing a fix for CVE-2026-50656 (“RoguePlanet”), an elevation-of-privilege issue in Microsoft Defender’s engine. Here’s what’s confirmed, what’s still unclear, and how to prepare while waiting for the patch.