Detections
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CVE-2026-50656

high

Description

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ". We are working to provide a high quality security update that addresses this vulnerability. We will provide information in this CVE when the update is available.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50656

https://www.securityweek.com/microsoft-working-on-patch-for-rogueplanet-zero-day/

https://thehackernews.com/2026/06/microsoft-confirms-rogueplanet-defender_02022423645.html

https://www.theregister.com/security/2026/06/10/nightmare-eclipse-publishes-new-windows-defender-zero-day/5253725

https://github.com/MSNightmare/RoguePlanet

Details

Source: Mitre, NVD

Published: 2026-06-16

Updated: 2026-06-17

Named Vulnerability: RoguePlanetNamed Vulnerability: GreatXML

Risk Information

CVSS v2

Base Score: 6

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00387

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest