Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".
CVE-2026-50656
“▲” beside the score: it is higher than NVD's CVSS score.
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-16. NVD baseline CVSS 7.0; sources differ by 0.8.
Also known asEUVD-2026-37141 (ENISA EUVD) · GHSA-hgx9-224c-3p2x (GitHub Security Advisories)Source: ENISA EUVD
- Public exploit or proof-of-concept code is available
A fix is available — apply it.
- CVSS v3
- 7.0
- EG Score
- 7.8HIGHmedium confidence
- EG Risk
- 51EG Risk 51/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity78% × 45%Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 11%
- EPSS %ILE
- 95th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 11% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
June 16, 2026
Last Modified
October 25, 2026
Advisory Details (2)
Auto-updated Jun 16, 2026GitHub - MSNightmare/RoguePlanet: RoguePlanet Windows Defender Vulnerability · GitHub
https://github.com/MSNightmare/RoguePlanetSecurity Update Guide - Microsoft Security Response Center
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50656Vendor Advisories for CVE-2026-50656(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 17× in last 7d / 47× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 404 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 304 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-10-29 16:25 UTCEG score recompute
- 2026-10-29 16:25 UTCVendor advisory
- 2026-10-29 16:25 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-10-25 23:32 UTCEG score recompute
- 2026-10-25 23:32 UTCVendor advisory
- 2026-10-25 23:32 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-25 16:33 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-10-25 14:21 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-24 14:35 UTCEG score recompute
- 2026-10-24 14:35 UTCVendor advisory
- 2026-10-24 14:35 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-18 03:33 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
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- 2026-10-17 11:36 UTCEG score recompute
- 2026-10-17 11:36 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-12 15:59 UTCEG score recompute
- 2026-10-11 19:42 UTCEG score recompute
- 2026-10-11 16:57 UTCEG score recompute
- 2026-10-11 14:20 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-09-24 14:04 UTCEG score recompute
- 2026-09-24 14:04 UTCVendor advisory
- 2026-09-24 14:04 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-09-23 17:53 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-14 03:30 UTCEG score recompute
- 2026-09-14 03:30 UTCVendor advisory
- 2026-09-14 03:30 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-10 09:35 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-30 22:47 UTCEG score recompute
- 2026-08-30 22:47 UTCVendor advisory
- 2026-08-30 22:47 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-25 23:01 UTCEG score recompute
- 2026-08-25 23:01 UTCVendor advisory
- 2026-08-25 23:01 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-25 03:13 UTCVendor advisory
- 2026-08-25 03:13 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-08-24 15:34 UTCEG score recompute
- 2026-08-24 15:34 UTCVendor advisory
- 2026-08-24 15:34 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-08-23 21:00 UTCVendor advisory
- 2026-08-23 21:00 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-08-23 09:25 UTCEG score recompute
- 2026-08-23 09:25 UTCVendor advisory
- 2026-08-23 09:25 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 11% · 95th percentile
- 2026-08-21 19:29 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-08-21 07:49 UTCEG score recompute
- 2026-08-21 07:49 UTCVendor advisory
- 2026-08-21 07:49 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
Publicly available exploits
(3 references)Public exploit code is referenced for this CVE (3 GitHub PoCs). Defenders should treat patch urgency accordingly.
- GitHub PoC0xBlackash/CVE-2026-50656Published Jun 18, 2026
CVE-2026-50656
Open source ↗ - GitHub PoC0xredash/CVE-2026-50656Published Jun 18, 2026
CVE-2026-50656
Open source ↗ - GitHub PoCg0thamRabb1t/CVE-2026-50656-rogueplanet-validationPublished Jun 10, 2026
Validation report for the RoguePlanet Microsoft Defender PoC in a controlled Windows 11 lab environment, including build notes, Defender detection results, risk assessment, and mitigation recommendations.
Open source ↗
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-50656?
When was CVE-2026-50656 made public?
Is CVE-2026-50656 actively exploited?
What is the CVSS score of CVE-2026-50656?
How do I remediate CVE-2026-50656?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-50656
Is Your Infrastructure Affected by CVE-2026-50656?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.