CVE-2026-76886

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

C12.22 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
9.8
EG Score
9.8(medium)
EG Risk
60(Track*)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 28, 2026

Advisory Details (3)

Auto-updated Sep 18, 2026
No patch confirmed yet.
generic

CMS MessageDigest verification dereferences missing algorithm (#21446) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21446
generic

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-75 C12.22 protocol dissector crash

https://www.wireshark.org/security/wnpa-sec-2026-75.html
generic

EAX CMAC 16-bit length truncation can overflow heap on large C12.22 cleartext-auth payloads (#21439) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21439

Vendor Advisories for CVE-2026-76886(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 rangeFixed inDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
wireshark4.4.13-0+deb13u1 ... 4.4.9-1 (7 versions)4.4.18-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 50× in last 7d / 196× 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 208 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76886?
CVE-2026-76886 is a critical vulnerability published on August 19, 2026. C12.22 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-2026-76886 disclosed?
CVE-2026-76886 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76886 actively exploited?
CVE-2026-76886 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 74.9% of all scored CVEs.
What is the CVSS score of CVE-2026-76886?
CVE-2026-76886 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-76886?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76886, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76886

Explore →

Is Your Infrastructure Affected by CVE-2026-76886?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs