CVE-2026-50656

HIGHNVD 7.07.8
EchelonGraph scoreMEDIUM confidence

“▲” 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.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekElevated

Also known asEUVD-2026-37141 (ENISA EUVD) · GHSA-hgx9-224c-3p2x (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 11%CVSS: 7.0Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

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

CVSS v3
7.0
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG 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, 2026
Patch available. Sources: microsoft.
Web page

GitHub - MSNightmare/RoguePlanet: RoguePlanet Windows Defender Vulnerability · GitHub

https://github.com/MSNightmare/RoguePlanet
MicrosoftMentions a patch (unverified)

Security Update Guide - Microsoft Security Response Center

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

Vendor 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.

  1. 2026-10-30 16:34 UTCEPSS rescoreEPSS 11% · 95th percentile
  2. 2026-10-29 16:33 UTCEPSS rescoreEPSS 11% · 95th percentile
  3. 2026-10-29 16:25 UTCEG score recompute
  4. 2026-10-29 16:25 UTCVendor advisory
  5. 2026-10-29 16:25 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 11% · 95th percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 11% · 95th percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 11% · 95th percentile
  9. 2026-10-25 23:32 UTCEG score recompute
  10. 2026-10-25 23:32 UTCVendor advisory
  11. 2026-10-25 23:32 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  12. 2026-10-25 16:33 UTCEPSS rescoreEPSS 11% · 95th percentile
  13. 2026-10-25 14:21 UTCEG score recompute
  14. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-24 14:35 UTCEG score recompute
  16. 2026-10-24 14:35 UTCVendor advisory
  17. 2026-10-24 14:35 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  19. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  20. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  21. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  22. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  23. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  24. 2026-10-18 03:33 UTCEG score recompute
  25. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
Show 75 more
  1. 2026-10-17 11:36 UTCEG score recompute
  2. 2026-10-17 11:36 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  3. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  6. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-10-12 15:59 UTCEG score recompute
  9. 2026-10-11 19:42 UTCEG score recompute
  10. 2026-10-11 16:57 UTCEG score recompute
  11. 2026-10-11 14:20 UTCEG score recompute
  12. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  21. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  26. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  27. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  28. 2026-09-24 14:04 UTCEG score recompute
  29. 2026-09-24 14:04 UTCVendor advisory
  30. 2026-09-24 14:04 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  31. 2026-09-23 17:53 UTCEPSS rescoreEPSS 11% · 95th percentile
  32. 2026-09-18 19:28 UTCEPSS rescoreEPSS 11% · 95th percentile
  33. 2026-09-16 14:08 UTCEPSS rescoreEPSS 11% · 95th percentile
  34. 2026-09-16 05:15 UTCEPSS rescoreEPSS 11% · 95th percentile
  35. 2026-09-14 03:30 UTCEG score recompute
  36. 2026-09-14 03:30 UTCVendor advisory
  37. 2026-09-14 03:30 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  38. 2026-09-13 16:47 UTCEPSS rescoreEPSS 11% · 95th percentile
  39. 2026-09-11 14:53 UTCEPSS rescoreEPSS 11% · 95th percentile
  40. 2026-09-10 09:35 UTCEPSS rescoreEPSS 11% · 95th percentile
  41. 2026-09-08 22:01 UTCEPSS rescoreEPSS 11% · 95th percentile
  42. 2026-09-07 16:01 UTCEPSS rescoreEPSS 11% · 95th percentile
  43. 2026-09-06 13:47 UTCEPSS rescoreEPSS 11% · 95th percentile
  44. 2026-09-04 05:06 UTCEPSS rescoreEPSS 11% · 95th percentile
  45. 2026-09-02 14:12 UTCEPSS rescoreEPSS 11% · 95th percentile
  46. 2026-09-01 13:54 UTCEPSS rescoreEPSS 11% · 95th percentile
  47. 2026-09-01 04:40 UTCEPSS rescoreEPSS 11% · 95th percentile
  48. 2026-08-30 22:47 UTCEG score recompute
  49. 2026-08-30 22:47 UTCVendor advisory
  50. 2026-08-30 22:47 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  51. 2026-08-30 19:17 UTCEPSS rescoreEPSS 11% · 95th percentile
  52. 2026-08-30 01:22 UTCEPSS rescoreEPSS 11% · 95th percentile
  53. 2026-08-28 21:41 UTCEPSS rescoreEPSS 11% · 95th percentile
  54. 2026-08-27 14:25 UTCEPSS rescoreEPSS 11% · 95th percentile
  55. 2026-08-26 14:46 UTCEPSS rescoreEPSS 11% · 95th percentile
  56. 2026-08-25 23:01 UTCEG score recompute
  57. 2026-08-25 23:01 UTCVendor advisory
  58. 2026-08-25 23:01 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 11% · 95th percentile
  60. 2026-08-25 03:13 UTCVendor advisory
  61. 2026-08-25 03:13 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-08-24 15:34 UTCEG score recompute
  63. 2026-08-24 15:34 UTCVendor advisory
  64. 2026-08-24 15:34 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  65. 2026-08-23 21:00 UTCVendor advisory
  66. 2026-08-23 21:00 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-08-23 09:25 UTCEG score recompute
  68. 2026-08-23 09:25 UTCVendor advisory
  69. 2026-08-23 09:25 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  70. 2026-08-23 00:19 UTCEPSS rescoreEPSS 11% · 95th percentile
  71. 2026-08-21 23:49 UTCEPSS rescoreEPSS 11% · 95th percentile
  72. 2026-08-21 19:29 UTCGHSA enrichmentGHSA-hgx9-224c-3p2x · GitHub severity HIGH · GitHub CVSS 7.8
  73. 2026-08-21 07:49 UTCEG score recompute
  74. 2026-08-21 07:49 UTCVendor advisory
  75. 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-2026-50656
    Published Jun 18, 2026

    CVE-2026-50656

    Open source ↗
  • GitHub PoC0xredash/CVE-2026-50656
    Published Jun 18, 2026

    CVE-2026-50656

    Open source ↗
  • GitHub PoCg0thamRabb1t/CVE-2026-50656-rogueplanet-validation
    Published 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 ↗

Frequently asked(5)

What is CVE-2026-50656?
CVE-2026-50656 is a high-severity vulnerability; its CVE record was published on June 16, 2026. Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".
When was CVE-2026-50656 made public?
CVE-2026-50656 was made public on June 16, 2026: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on June 16, 2026. EchelonGraph's copy of the record carries a last-modified date of October 25, 2026; the record at its source may have been updated since.
Is CVE-2026-50656 actively exploited?
CVE-2026-50656 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11% probability of exploitation in the next 30 days (95th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-50656?
CVE-2026-50656 has a CVSS v3 base score of 7.0 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 7.8 (HIGH).
How do I remediate CVE-2026-50656?
A fix for CVE-2026-50656 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-50656 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-50656

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