Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.

Microsoft confirmed that it's working on a security patch for a Defender zero-day vulnerability named "RoguePlanet," disclosed one week ago.

Microsoft has acknowledged the RoguePlanet zero-day exploit and is working on a high-quality patch to resolve the vulnerability.

Microsoft is preparing a patch for RoguePlanet, a Defender flaw tracked as CVE-2026-50656 that can enable privilege escalation.

Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.