Public proof of concept

CVE-2026-50656

Microsoft Defender Elevation of Privilege Vulnerability

A public proof of concept exists; no exploitation attested.

Published2026-06-16
WeaknessCWE-59

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC

2026-06-1619:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-25 15:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-50656?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-50656?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft malware protection engine

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

msrc.microsoft.comVendor Advisory

Detection

read 2026-10-25 00:28 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 4 repositories, unverifiedg0thamRabb1t/CVE-2026-50656-rogueplanet-validation0xBlackash/CVE-2026-50656HORKimhab/CVE-2026-50656eh-amish/Windows-Defender-Security-Auditor-CVE-2026-50656-

Sources

CISA-ADPSSVC decisionpoc2026-06-17
OpenCVESSVC decisionpoc—
CNACVSS 3.17.8read 2026-10-23
NVDCVSS 3.17read 2026-10-23
CNAweakness (CWE)CWE-59read 2026-10-23
FIRST EPSSEPSS score11.2 %2026-10-25
PoC-in-GitHubproof of concept4read 2026-10-25
Microsoft MSRCadvisory—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2026-06-16
Last Modified: 2026-08-12
NVD status: Modified
MSRC Title: Microsoft Defender Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2026-50656?

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

Is CVE-2026-50656 actively exploited?

A proof-of-concept exploit exists for CVE-2026-50656, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-50656?

CVE-2026-50656 has a CVSS v3 base score of 7 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

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