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PatchSiren cyber security CVE debrief

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
2026-08-12
Advisory published
2026-06-16
Advisory updated
2026-08-12

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50656 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50656

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50656 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50656

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

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

    [email protected]

  • Source reference

    Unverified legacy reference

    URL: https://github.com/MSNightmare/RoguePlanet

    134c704f-9b21-4f2e-91b3-4a467353bcc0

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.