CVE-2026-50656: Microsoft Defender Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-50656

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".

CSIRTS triage

vendor: Microsoft product: Microsoft Defender Privilege escalation

What: This vulnerability allows for elevation of privilege in the Microsoft Malware Protection Engine.
Who is affected: Users of Microsoft Defender that are exposed to the vulnerability.
Urgency: Remediation is urgent due to the high severity and potential for exploitation, with a CVSS score of 7.8.
Action: Apply the upcoming security update from Microsoft when available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

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

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Elevated exploitation riskCVE-2026-5065610.7% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 96% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50656	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] Microsoft Malware Protection Engine: Vulnerability allows privilege escalationcert-bund