CVE-2026-50381

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-14. the CNA's CVSS baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Access of resource using incompatible type ('type confusion') in Composite Image File System Driver allows an authorized attacker to disclose information locally.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

July 14, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Jul 15, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50381

Vendor Advisories for CVE-2026-50381(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 13× in last 7d / 82× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 223 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-50381?
CVE-2026-50381 is a medium vulnerability published on July 14, 2026. Access of resource using incompatible type ('type confusion') in Composite Image File System Driver allows an authorized attacker to disclose information locally.
When was CVE-2026-50381 disclosed?
CVE-2026-50381 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50381 actively exploited?
CVE-2026-50381 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.5% of all scored CVEs.
What is the CVSS score of CVE-2026-50381?
CVE-2026-50381 has a CVSS v4.0 base score of 5.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-50381?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50381, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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