CVE-2026-51400

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH 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(high)
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
3%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 5, 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 27× in last 7d / 63× 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.

  1. 2026-08-19 23:07 UTCEG score recompute
  2. 2026-08-19 23:07 UTCGHSA enrichment
  3. 2026-08-19 17:04 UTCEPSS rescore
  4. 2026-08-19 10:57 UTCGHSA enrichment
  5. 2026-08-18 22:48 UTCEG score recompute
  6. 2026-08-18 22:47 UTCGHSA enrichment
  7. 2026-08-18 13:48 UTCEPSS rescore
  8. 2026-08-18 10:28 UTCGHSA enrichment
  9. 2026-08-17 22:18 UTCEG score recompute
  10. 2026-08-17 22:18 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-17 10:08 UTCGHSA enrichment
  13. 2026-08-16 21:59 UTCEG score recompute
  14. 2026-08-16 21:59 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 09:50 UTCEG score recompute
  17. 2026-08-16 09:50 UTCGHSA enrichment
  18. 2026-08-16 02:14 UTCEPSS rescore
  19. 2026-08-15 21:41 UTCGHSA enrichment
  20. 2026-08-15 09:32 UTCEG score recompute
  21. 2026-08-15 09:32 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-14 21:23 UTCGHSA enrichment
  24. 2026-08-14 09:14 UTCEG score recompute
  25. 2026-08-14 09:14 UTCGHSA enrichment
Show 38 more
  1. 2026-08-13 22:00 UTCEPSS rescore
  2. 2026-08-13 21:04 UTCGHSA enrichment
  3. 2026-08-13 08:48 UTCGHSA enrichment
  4. 2026-08-12 20:39 UTCEG score recompute
  5. 2026-08-12 20:39 UTCGHSA enrichment
  6. 2026-08-12 13:51 UTCEPSS rescore
  7. 2026-08-12 08:30 UTCGHSA enrichment
  8. 2026-08-11 20:21 UTCEG score recompute
  9. 2026-08-11 20:21 UTCGHSA enrichment
  10. 2026-08-11 08:12 UTCEG score recompute
  11. 2026-08-11 08:12 UTCGHSA enrichment
  12. 2026-08-11 00:00 UTCEPSS rescore
  13. 2026-08-10 20:03 UTCGHSA enrichment
  14. 2026-08-10 07:54 UTCGHSA enrichment
  15. 2026-08-09 19:45 UTCEG score recompute
  16. 2026-08-09 19:45 UTCGHSA enrichment
  17. 2026-08-09 13:46 UTCEPSS rescore
  18. 2026-08-09 07:36 UTCGHSA enrichment
  19. 2026-08-08 19:27 UTCGHSA enrichment
  20. 2026-08-08 07:17 UTCGHSA enrichment
  21. 2026-08-07 19:08 UTCEG score recompute
  22. 2026-08-07 19:08 UTCGHSA enrichment
  23. 2026-08-07 06:59 UTCGHSA enrichment
  24. 2026-08-06 18:50 UTCEG score recompute
  25. 2026-08-06 18:50 UTCGHSA enrichment
  26. 2026-08-06 13:47 UTCEPSS rescore
  27. 2026-08-06 06:41 UTCEG score recompute
  28. 2026-08-06 06:41 UTCGHSA enrichment
  29. 2026-08-05 19:17 UTCEPSS rescore
  30. 2026-08-05 18:32 UTCEG score recompute
  31. 2026-08-05 18:32 UTCGHSA enrichment
  32. 2026-08-05 17:56 UTCEG score recompute▲ 8.40
  33. 2026-08-05 17:56 UTCGHSA enrichment
  34. 2026-08-05 17:55 UTCMITRE cvelistV5CVSS v3 → 8.4 · severity → HIGH
  35. 2026-08-04 21:32 UTCGHSA enrichment
  36. 2026-08-04 21:26 UTCNVD update
  37. 2026-08-04 21:13 UTCEG score recompute
  38. 2026-08-04 21:10 UTCMITRE cvelistV5first tracked

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 August 5, 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 97.5% 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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