CVE-2026-76918

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-08-20. A secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 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: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

SSH protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

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

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%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available.
generic

SSH dissector: heap buffer overflow in curve25519 key exchange (#21465) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21465
generic

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-85 SSH protocol dissector crash

https://www.wireshark.org/security/wnpa-sec-2026-85.html

Vendor Advisories for CVE-2026-76918(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.13-0+deb13u1 ... 4.4.9-1 (7 versions)
  • every version up to 4.4.18-0+deb13u1: fixed in 4.4.18-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 68× 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 109 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76918?
CVE-2026-76918 is a medium vulnerability published on August 19, 2026. SSH protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
When was CVE-2026-76918 disclosed?
CVE-2026-76918 was first published on August 19, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76918 actively exploited?
CVE-2026-76918 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76918?
CVE-2026-76918 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-2026-76918?
A fix for CVE-2026-76918 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76918 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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