CVE-2026-55892

MEDIUMPre-NVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (1st 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

Also known asEUVD-2026-39451 (ENISA EUVD)Source: ENISA EUVD

5.5EG
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: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Vim is an open source, command line text editor. Prior to 9.2.0662, the dump_prefixes() function in src/spell.c walks a spell-file prefix trie iteratively with a depth counter while dumping the prefixes that apply to a word. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (prefix[], arridx[], curi[]). A crafted .spl file, loaded when the user dumps the word list, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0662.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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
0.1%
EPSS %ILE
1st
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.1% 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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Out-of-bounds Write in Spell File Prefix Dump in Vim < 9.2.0662 · Advisory · vim/vim · GitHub

Affected: 9.2.0653) in a sibling trie walker that was

https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h
GitHub commit

commit 8325b193bba5 (vim/vim)

Fix landed in vim/vim commit 8325b193bba5 — awaiting tagged release

https://github.com/vim/vim/commit/8325b193bba5f01e7a7d8241f

Vendor Advisories for CVE-2026-55892(7)

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

Patch Availability(7)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuxxd (2:9.1.2141-1ubuntu4.6) @ resolute2026-10-22ubuntu
redhatrhui5/rhua-rhel9:17902420042026-09-24redhat
redhatrhui5/installer-rhel9:17894829612026-09-16redhat
redhatvim-2:8.0.1763-31.el8_10.72026-09-10redhat
redhatvim-2:8.2.2637-26.el9_8.212026-09-10redhat
redhatvim-2:9.1.083-9.el10_2.202026-09-10redhat
redhatvim-main-9.2.780-1.hum12026-07-03redhat

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

(5 across 5 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
vim—
  • every version up to 9.2.0854-r0: fixed in 9.2.0854-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
vim2:8.2.2434-3 ... 2:9.2.0858-1 (63 versions)
  • every version on: no fix on record
—
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 ... 2:9.2.0524-1 (17 versions)
  • every version up to 2:9.2.0782-1: fixed in 2:9.2.0782-1
—

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 6× in last 7d / 36× 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 208 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 108 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-30 10:55 UTCOSV refresh
  4. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-25 14:18 UTCEG score recompute
  9. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-22 21:13 UTCEG score recompute
  12. 2026-10-22 21:13 UTCVendor advisory
  13. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-18 03:29 UTCEG score recompute
  18. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-13 22:54 UTCOSV refresh
  22. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-12 15:55 UTCEG score recompute
  25. 2026-10-11 19:38 UTCEG score recompute
Show 75 more
  1. 2026-10-11 16:53 UTCEG score recompute
  2. 2026-10-11 14:16 UTCEG score recompute
  3. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-23 08:46 UTCEG score recompute
  22. 2026-09-23 08:46 UTCVendor advisory
  23. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-18 07:23 UTCEG score recompute
  26. 2026-09-18 07:23 UTCVendor advisory
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-09-14 01:19 UTCEG score recompute
  31. 2026-09-14 01:19 UTCVendor advisory
  32. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-09-12 15:48 UTCEG score recompute
  34. 2026-09-12 15:48 UTCVendor advisory
  35. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  43. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  44. 2026-08-30 19:34 UTCEG score recompute
  45. 2026-08-30 19:34 UTCVendor advisory
  46. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  47. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  48. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  49. 2026-08-27 23:22 UTCEG score recompute
  50. 2026-08-27 23:22 UTCVendor advisory
  51. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  52. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  53. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  54. 2026-08-24 13:27 UTCEG score recompute
  55. 2026-08-24 13:27 UTCVendor advisory
  56. 2026-08-23 11:57 UTCEG score recompute
  57. 2026-08-23 11:57 UTCVendor advisory
  58. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  59. 2026-08-22 10:30 UTCEG score recompute
  60. 2026-08-22 10:30 UTCVendor advisory
  61. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-08-21 08:30 UTCEG score recompute
  63. 2026-08-21 08:30 UTCVendor advisory
  64. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-08-20 07:04 UTCEG score recompute
  66. 2026-08-20 07:04 UTCVendor advisory
  67. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-08-19 01:24 UTCEG score recompute
  69. 2026-08-19 01:24 UTCVendor advisory
  70. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  71. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  72. 2026-08-17 08:51 UTCEG score recompute
  73. 2026-08-17 08:51 UTCVendor advisory
  74. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  75. 2026-08-16 07:26 UTCEG score recompute

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

Frequently asked(5)

What is CVE-2026-55892?
CVE-2026-55892 is a medium-severity vulnerability; its CVE record was published on June 25, 2026. Vim is an open source, command line text editor. Prior to 9.2.0662, the dump_prefixes() function in src/spell.c walks a spell-file prefix trie iteratively with a depth counter while dumping the prefixes that apply to a word. The counter is bounded only by the trie structure itself; it is never…
When was the CVE record for CVE-2026-55892 published?
The CVE record for CVE-2026-55892 was published on June 25, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 26, 2026; the record at its source may have been updated since.
Is CVE-2026-55892 actively exploited?
CVE-2026-55892 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55892?
CVE-2026-55892 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55892?
A fix for CVE-2026-55892 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55892 are linked in the Vendor Advisories panel on this page.

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