CVE-2026-76881

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed services: Not assessed

A fix is available — apply it.

CMS 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
41
EG Risk 41/100CISA 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%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
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 low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation public PoC (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

September 1, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available.
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-2026-76 CMS protocol dissector crash

https://www.wireshark.org/security/wnpa-sec-2026-76.html

Vendor Advisories for CVE-2026-76881(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 14× in last 7d / 65× 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 113 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 21:37 UTCGHSA enrichment
  3. 2026-10-03 19:24 UTCEG score recompute
  4. 2026-10-03 19:24 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 16:25 UTCGHSA enrichment
  7. 2026-10-02 16:24 UTCEG score recompute
  8. 2026-10-02 16:24 UTCGHSA enrichment
  9. 2026-10-01 19:50 UTCEPSS rescore
  10. 2026-10-01 14:08 UTCEG score recompute
  11. 2026-10-01 14:08 UTCGHSA enrichment
  12. 2026-09-30 11:55 UTCGHSA enrichment
  13. 2026-09-29 08:42 UTCEG score recompute
  14. 2026-09-29 08:42 UTCGHSA enrichment
  15. 2026-09-28 13:52 UTCEPSS rescore
  16. 2026-09-28 06:28 UTCEG score recompute
  17. 2026-09-28 06:28 UTCGHSA enrichment
  18. 2026-09-27 13:48 UTCEPSS rescore
  19. 2026-09-27 04:15 UTCEG score recompute
  20. 2026-09-27 04:15 UTCGHSA enrichment
  21. 2026-09-26 15:59 UTCEPSS rescore
  22. 2026-09-26 00:28 UTCEPSS rescore
  23. 2026-09-24 14:04 UTCEPSS rescore
  24. 2026-09-24 12:30 UTCEG score recompute
  25. 2026-09-24 12:30 UTCGHSA enrichment
Show 75 more
  1. 2026-09-23 17:54 UTCEPSS rescore
  2. 2026-09-23 10:17 UTCGHSA enrichment
  3. 2026-09-22 08:04 UTCEG score recompute
  4. 2026-09-22 08:04 UTCGHSA enrichment
  5. 2026-09-21 21:09 UTCEPSS rescore
  6. 2026-09-21 05:50 UTCGHSA enrichment
  7. 2026-09-20 02:45 UTCEG score recompute
  8. 2026-09-20 02:45 UTCGHSA enrichment
  9. 2026-09-19 00:32 UTCEG score recompute
  10. 2026-09-19 00:31 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-17 22:17 UTCEG score recompute
  13. 2026-09-17 22:17 UTCGHSA enrichment
  14. 2026-09-16 20:04 UTCEG score recompute
  15. 2026-09-16 20:04 UTCGHSA enrichment
  16. 2026-09-16 14:08 UTCEPSS rescore
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 15:28 UTCEG score recompute
  19. 2026-09-15 15:28 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 13:14 UTCEG score recompute
  22. 2026-09-14 13:14 UTCGHSA enrichment
  23. 2026-09-13 11:01 UTCEG score recompute
  24. 2026-09-13 11:01 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
  26. 2026-09-12 08:48 UTCEG score recompute
  27. 2026-09-12 08:48 UTCGHSA enrichment
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 06:34 UTCEG score recompute
  30. 2026-09-11 06:34 UTCGHSA enrichment
  31. 2026-09-10 09:35 UTCEPSS rescore
  32. 2026-09-10 04:21 UTCGHSA enrichment
  33. 2026-09-09 02:08 UTCEG score recompute
  34. 2026-09-09 02:08 UTCGHSA enrichment
  35. 2026-09-08 22:01 UTCEPSS rescore
  36. 2026-09-07 06:58 UTCEG score recompute
  37. 2026-09-07 06:58 UTCGHSA enrichment
  38. 2026-09-06 13:48 UTCEPSS rescore
  39. 2026-09-06 04:34 UTCEG score recompute
  40. 2026-09-06 04:34 UTCGHSA enrichment
  41. 2026-09-05 02:21 UTCEG score recompute
  42. 2026-09-05 02:21 UTCGHSA enrichment
  43. 2026-09-04 05:07 UTCEPSS rescore
  44. 2026-09-04 00:06 UTCGHSA enrichment
  45. 2026-09-02 21:13 UTCEG score recompute
  46. 2026-09-02 21:13 UTCGHSA enrichment
  47. 2026-09-02 14:12 UTCEPSS rescore
  48. 2026-09-01 15:59 UTCEG score recompute▲ 0.80
  49. 2026-09-01 15:59 UTCGHSA enrichment
  50. 2026-09-01 15:35 UTCNVD updateCVSS v3 → 5.5
  51. 2026-09-01 04:40 UTCEPSS rescore
  52. 2026-09-01 04:40 UTCEPSS rescore
  53. 2026-08-31 22:37 UTCGHSA enrichment
  54. 2026-08-30 20:24 UTCEG score recompute
  55. 2026-08-30 20:24 UTCGHSA enrichment
  56. 2026-08-30 19:18 UTCEPSS rescore
  57. 2026-08-30 19:17 UTCEPSS rescore
  58. 2026-08-30 01:22 UTCEPSS rescore
  59. 2026-08-29 18:11 UTCEG score recompute
  60. 2026-08-29 18:11 UTCGHSA enrichment
  61. 2026-08-28 21:42 UTCEPSS rescore
  62. 2026-08-28 15:54 UTCGHSA enrichment
  63. 2026-08-28 07:03 UTCEG score recompute
  64. 2026-08-28 07:03 UTCGHSA enrichment
  65. 2026-08-27 14:25 UTCEPSS rescore
  66. 2026-08-27 04:48 UTCEG score recompute
  67. 2026-08-27 04:48 UTCGHSA enrichment
  68. 2026-08-26 14:47 UTCEPSS rescore
  69. 2026-08-26 02:35 UTCGHSA enrichment
  70. 2026-08-25 00:22 UTCEG score recompute
  71. 2026-08-25 00:22 UTCGHSA enrichment
  72. 2026-08-24 14:18 UTCEPSS rescore
  73. 2026-08-23 22:08 UTCEG score recompute
  74. 2026-08-23 22:08 UTCGHSA enrichment
  75. 2026-08-23 00:19 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76881?
CVE-2026-76881 is a medium vulnerability published on August 19, 2026. CMS 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-2026-76881 disclosed?
CVE-2026-76881 was first published on August 19, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76881 actively exploited?
CVE-2026-76881 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-2026-76881?
CVE-2026-76881 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-76881?
A fix for CVE-2026-76881 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76881 are linked in the Vendor Advisories panel on this page.

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