CVE-2026-50418

MEDIUMNVD 6.16.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.3% (18th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 5.1 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-07-14) is not newer than that change (2026-10-08), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-43923 (ENISA EUVD) · GHSA-56fw-c5xp-6pv2 (GitHub Security Advisories)Source: ENISA EUVD

6.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper access control in Windows System allows an unauthorized attacker to bypass a security feature locally.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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)
Severity61% × 45%
Impact severity (EG Severity): CVSS 6.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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.
EPSS PROB
0.3%
EPSS %ILE
18th
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 (6.1): severity, escalated by confirmed exploitation. This CVE's 6.1 is its impact severity (EG Severity), not escalated.

EG Severity
6.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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

July 14, 2026

Last Modified

October 8, 2026

Advisory Details (1)

Auto-updated Jul 15, 2026
Patch available. Sources: microsoft.
MicrosoftMentions a patch (unverified)

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50418

Vendor Advisories for CVE-2026-50418(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 10× in last 7d / 45× 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 278 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 178 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  4. 2026-10-25 14:22 UTCEG score recompute
  5. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  6. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  7. 2026-10-22 22:56 UTCEG score recompute
  8. 2026-10-22 22:56 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  9. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  10. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  11. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  12. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  13. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  14. 2026-10-18 03:33 UTCEG score recompute
  15. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  16. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  17. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  20. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-10-12 15:59 UTCEG score recompute
  22. 2026-10-11 19:42 UTCEG score recompute
  23. 2026-10-11 16:57 UTCEG score recompute
  24. 2026-10-11 14:21 UTCEG score recompute
  25. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
Show 75 more
  1. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  3. 2026-10-08 19:27 UTCEG score recompute
  4. 2026-10-08 19:27 UTCVendor advisory
  5. 2026-10-08 19:27 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  6. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  7. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  9. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  10. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  11. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  14. 2026-10-01 13:03 UTCEG score recompute
  15. 2026-10-01 13:03 UTCVendor advisory
  16. 2026-10-01 13:03 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  17. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  18. 2026-09-28 09:13 UTCEG score recompute
  19. 2026-09-28 09:13 UTCVendor advisory
  20. 2026-09-28 09:13 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  22. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  23. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  24. 2026-09-25 19:01 UTCEG score recompute
  25. 2026-09-25 19:01 UTCVendor advisory
  26. 2026-09-25 19:00 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  27. 2026-09-24 09:12 UTCEG score recompute
  28. 2026-09-24 09:12 UTCVendor advisory
  29. 2026-09-24 09:12 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  30. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  31. 2026-09-23 03:45 UTCEG score recompute
  32. 2026-09-23 03:45 UTCVendor advisory
  33. 2026-09-23 03:45 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  34. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  35. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  36. 2026-09-17 23:15 UTCEG score recompute
  37. 2026-09-17 23:15 UTCVendor advisory
  38. 2026-09-17 23:15 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  39. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  40. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  41. 2026-09-14 07:51 UTCEG score recompute
  42. 2026-09-14 07:51 UTCVendor advisory
  43. 2026-09-14 07:51 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  44. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  45. 2026-09-13 07:47 UTCEG score recompute
  46. 2026-09-13 07:47 UTCVendor advisory
  47. 2026-09-13 07:47 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  48. 2026-09-12 01:29 UTCEG score recompute
  49. 2026-09-12 01:29 UTCVendor advisory
  50. 2026-09-12 01:29 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  51. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  52. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  53. 2026-09-09 22:49 UTCEG score recompute
  54. 2026-09-09 22:49 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  55. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  56. 2026-09-08 21:56 UTCVendor advisory
  57. 2026-09-08 21:56 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  58. 2026-09-08 01:31 UTCEG score recompute
  59. 2026-09-08 01:31 UTCVendor advisory
  60. 2026-09-08 01:31 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  61. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  62. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  63. 2026-09-05 23:07 UTCEG score recompute
  64. 2026-09-05 23:07 UTCVendor advisory
  65. 2026-09-05 23:07 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  66. 2026-09-04 23:02 UTCEG score recompute
  67. 2026-09-04 23:02 UTCVendor advisory
  68. 2026-09-04 23:01 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  69. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  70. 2026-09-02 19:49 UTCEG score recompute
  71. 2026-09-02 19:49 UTCVendor advisory
  72. 2026-09-02 19:49 UTCGHSA enrichmentGHSA-56fw-c5xp-6pv2 · GitHub CVSS 5.1
  73. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  74. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  75. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-50418?
CVE-2026-50418 is a medium-severity vulnerability; its CVE record was published on July 14, 2026. Improper access control in Windows System allows an unauthorized attacker to bypass a security feature locally.
When was CVE-2026-50418 made public?
CVE-2026-50418 was made public on July 14, 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 July 14, 2026. EchelonGraph's copy of the record carries a last-modified date of October 8, 2026; the record at its source may have been updated since.
Is CVE-2026-50418 actively exploited?
CVE-2026-50418 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-50418?
CVE-2026-50418 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-50418?
A fix for CVE-2026-50418 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-50418 are linked in the Vendor Advisories panel on this page.

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