CVE-2026-51400

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

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

An issue in Vim Project v9.2.0389 and earlier allows a local attacker to execute arbitrary code via the vms_fixfilename() function within file vim/src/os_vms.c

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 4, 2026

Last Modified

September 4, 2026

Advisory Details (1)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

Security Advisory for CVE-2026-51400 & CVE-2026-51401 (Vim os_vms.c vulnerabilities) · GitHub

https://gist.github.com/jiejiaodedengdai/ff5d34a523167e09b7d8330cc9f5d4e5#file-vim-os_vms-cves-md

Vendor Advisories for CVE-2026-51400(1)

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 22× in last 7d / 92× 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 160 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51400?
CVE-2026-51400 is a high vulnerability published on August 4, 2026. An issue in Vim Project v9.2.0389 and earlier allows a local attacker to execute arbitrary code via the vmsfixfilename() function within file vim/src/osvms.c
When was CVE-2026-51400 disclosed?
CVE-2026-51400 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51400 actively exploited?
CVE-2026-51400 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 97.7% of all scored CVEs.
What is the CVSS score of CVE-2026-51400?
CVE-2026-51400 has a CVSS v3.1 base score of 8.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51400?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51400, 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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