CVE-2026-50656

CVSS 7.8 · HIGH

EPSS p26

Lower risk — in the top 74% least-likely-to-be-exploited CVEs.

Patch available

Vendor advisory or patch linked

Published 6/16/2026 · updated 6/17/2026 · CWE-59

Summary

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.

CVSS 7.8 — HIGH

7.8 / 10

AV: Local
AC: Low complexity
PR: Low privileges
UI: No user interaction
S: Scope unchanged
C: Confidentiality: High
I: Integrity: High
A: Availability: High

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

EPSS exploitation probability

0.3%

Percentile p26 — Lower risk — in the top 74% least-likely-to-be-exploited CVEs.

Affected products

1 vendor/product entries

Microsoft Malware Protection Engineall versions

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Timeline

Jun 16, 2026 · Disclosed / published in NVD
Jun 17, 2026 · Intel last updated

Intel sources

Which upstream feeds returned data for this CVE, and when they were last fetched.

NVD· 41 days ago
CVE.org· no data
FIRST EPSS· 42 days ago
CISA KEV· no data
OSV· 42 days ago

References

Vendor & CERT advisories1

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

Other1

https://github.com/MSNightmare/RoguePlanet

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