CVE-2026-43961

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (11th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user running Vim.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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 (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.2% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (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.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (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

August 19, 2026

Last Modified

September 22, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
Patch available. Sources: redhat, github.
GitHub advisoryMentions a patch (unverified)

Vimscript Code Injection in netrw NetrwMarkFile() via crafted filename affects Vim < 9.2.0480 · Advisory · vim/vim · GitHub

https://github.com/vim/vim/security/advisories/GHSA-66hr-7p6x-x5j3
Red Hat

2460434 – (CVE-2026-43961) CVE-2026-43961 vim: Vimscript injection via unescaped filename in netrw s:NetrwMarkFile() filter() expression allows arbitrary code execution

https://bugzilla.redhat.com/show_bug.cgi?id=2460434
Red HatMentions a patch (unverified)

CVE-2026-43961 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-43961

Vendor Advisories for CVE-2026-43961(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuvim-tiny (2:7.4.052-1ubuntu3.1+esm28) @ trusty2026-10-08ubuntu
redhatvim-main-9.2.967-1.1.hum12026-08-20redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
vim—
  • every version up to 9.2.0481-r0: fixed in 9.2.0481-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
vim2:9.0.1378-2 ... 2:9.2.0858-1 (45 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
vim2:9.1.1230-2 ... 2:9.2.0858-1 (19 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
vim2:9.1.1230-2 ... 2:9.2.0461-1 (16 versions)
  • every version up to 2:9.2.0524-1: fixed in 2:9.2.0524-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 93× 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 188 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 88 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-12 16:05 UTCEG score recompute
  4. 2026-10-11 19:47 UTCEG score recompute
  5. 2026-10-11 17:02 UTCEG score recompute
  6. 2026-10-11 14:27 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-08 08:32 UTCEG score recompute
  12. 2026-10-08 08:32 UTCVendor advisory
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-07 10:29 UTCVendor advisory
  15. 2026-10-06 21:23 UTCEG score recompute
  16. 2026-10-06 21:23 UTCVendor advisory
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-06 07:59 UTCEG score recompute
  19. 2026-10-06 07:59 UTCVendor advisory
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-05 09:55 UTCEG score recompute
  22. 2026-10-05 09:55 UTCVendor advisory
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-10-04 21:26 UTCVendor advisory
  25. 2026-10-04 05:26 UTCVendor advisory
Show 75 more
  1. 2026-10-03 16:58 UTCEG score recompute
  2. 2026-10-03 16:58 UTCVendor advisory
  3. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-03 01:37 UTCEG score recompute
  5. 2026-10-03 01:37 UTCVendor advisory
  6. 2026-10-02 12:58 UTCVendor advisory
  7. 2026-10-01 22:48 UTCEG score recompute
  8. 2026-10-01 22:48 UTCVendor advisory
  9. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-01 09:47 UTCVendor advisory
  11. 2026-09-30 21:18 UTCEG score recompute
  12. 2026-09-30 21:18 UTCVendor advisory
  13. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-09-30 08:50 UTCEG score recompute
  15. 2026-09-30 08:50 UTCVendor advisory
  16. 2026-09-28 21:44 UTCEG score recompute
  17. 2026-09-28 21:44 UTCVendor advisory
  18. 2026-09-28 08:08 UTCVendor advisory
  19. 2026-09-27 19:32 UTCEG score recompute
  20. 2026-09-27 19:32 UTCVendor advisory
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-09-27 07:04 UTCEG score recompute
  23. 2026-09-27 07:04 UTCVendor advisory
  24. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-09-25 00:54 UTCEG score recompute
  26. 2026-09-25 00:54 UTCVendor advisory
  27. 2026-09-24 11:58 UTCVendor advisory
  28. 2026-09-23 23:29 UTCEG score recompute
  29. 2026-09-23 23:29 UTCVendor advisory
  30. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  31. 2026-09-23 10:49 UTCVendor advisory
  32. 2026-09-22 22:03 UTCEG score recompute
  33. 2026-09-22 22:03 UTCVendor advisory
  34. 2026-09-22 09:34 UTCEG score recompute
  35. 2026-09-22 09:34 UTCVendor advisory
  36. 2026-09-22 08:58 UTCEG score recompute
  37. 2026-09-22 08:58 UTCVendor advisory
  38. 2026-09-22 00:58 UTCEG score recompute
  39. 2026-09-22 00:58 UTCVendor advisory
  40. 2026-09-21 12:30 UTCEG score recompute
  41. 2026-09-21 12:30 UTCVendor advisory
  42. 2026-09-21 11:25 UTCVendor advisory
  43. 2026-09-21 10:35 UTCEG score recompute
  44. 2026-09-21 10:35 UTCVendor advisory
  45. 2026-09-21 03:13 UTCEG score recompute
  46. 2026-09-21 03:13 UTCVendor advisory
  47. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  48. 2026-09-20 02:06 UTCEG score recompute
  49. 2026-09-20 02:06 UTCVendor advisory
  50. 2026-09-19 13:37 UTCVendor advisory
  51. 2026-09-19 01:09 UTCEG score recompute
  52. 2026-09-19 01:09 UTCVendor advisory
  53. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  54. 2026-09-18 12:40 UTCVendor advisory
  55. 2026-09-18 00:10 UTCEG score recompute
  56. 2026-09-18 00:10 UTCVendor advisory
  57. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  58. 2026-09-17 11:16 UTCVendor advisory
  59. 2026-09-16 22:48 UTCEG score recompute
  60. 2026-09-16 22:48 UTCVendor advisory
  61. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  62. 2026-09-16 09:57 UTCEG score recompute
  63. 2026-09-16 09:57 UTCVendor advisory
  64. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  65. 2026-09-15 21:28 UTCVendor advisory
  66. 2026-09-15 09:00 UTCEG score recompute
  67. 2026-09-15 09:00 UTCVendor advisory
  68. 2026-09-14 20:31 UTCVendor advisory
  69. 2026-09-14 07:58 UTCVendor advisory
  70. 2026-09-13 19:30 UTCEG score recompute
  71. 2026-09-13 19:30 UTCVendor advisory
  72. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  73. 2026-09-13 07:01 UTCVendor advisory
  74. 2026-09-12 18:33 UTCEG score recompute
  75. 2026-09-12 18:33 UTCVendor advisory

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43961?
CVE-2026-43961 is a high-severity vulnerability; its CVE record was published on August 19, 2026. A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user…
When was CVE-2026-43961 made public?
CVE-2026-43961 was made public on August 19, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on August 19, 2026. EchelonGraph's copy of the record carries a last-modified date of September 22, 2026; the record at its source may have been updated since.
Is CVE-2026-43961 actively exploited?
CVE-2026-43961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43961?
CVE-2026-43961 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-43961?
A fix for CVE-2026-43961 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43961 are linked in the Vendor Advisories panel on this page.

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