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CVE-2026-50656 Microsoft CVE debrief

CVE-2026-50656 is an elevation of privilege vulnerability in the Microsoft Malware Protection Engine in Microsoft Defender, publicly referred to as 'RoguePlanet'. Microsoft is aware of this vulnerability and is working to provide a high-quality security update to address it. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity.

Vendor
Microsoft
Product
Microsoft Malware Protection Engine
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-16
Original CVE updated
2026-06-17
Advisory published
2026-06-16
Advisory updated
2026-06-17

Who should care

Users of Microsoft Defender are advised to monitor this CVE for updates as Microsoft works to provide a security update to address this vulnerability.

Technical summary

The vulnerability is an elevation of privilege issue in the Microsoft Malware Protection Engine. It has been publicly referred to as 'RoguePlanet'.

Defensive priority

HIGH

Recommended defensive actions

  • Monitor for updates from Microsoft regarding this vulnerability.
  • Consider implementing additional security measures to protect against potential exploitation.

Evidence notes

The CVE was published on 2026-06-16T19:16:59.683Z and last modified on 2026-06-16T20:42:25.013Z.

Official resources

CVE-2026-50656 was publicly disclosed on 2026-06-16.