CVE-2026-76889

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 99% 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 week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

UMTS FP 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
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

UMTS FP MAC-is descriptor count causes fixed-array out-of-bounds writes (#21413) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21413
generic

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-66 UMTS FP protocol dissector crash

https://www.wireshark.org/security/wnpa-sec-2026-66.html

Vendor Advisories for CVE-2026-76889(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 17× in last 7d / 70× 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.

  1. 2026-09-21 01:53 UTCEG score recompute
  2. 2026-09-21 01:53 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-19 23:47 UTCEG score recompute
  5. 2026-09-19 23:47 UTCGHSA enrichment
  6. 2026-09-18 21:41 UTCEG score recompute
  7. 2026-09-18 21:41 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-17 19:05 UTCGHSA enrichment
  10. 2026-09-16 20:03 UTCEG score recompute
  11. 2026-09-16 20:03 UTCGHSA enrichment
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 15:14 UTCEG score recompute
  15. 2026-09-15 15:14 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 12:46 UTCGHSA enrichment
  18. 2026-09-13 10:34 UTCEG score recompute
  19. 2026-09-13 10:34 UTCGHSA enrichment
  20. 2026-09-12 15:02 UTCEPSS rescore
  21. 2026-09-12 08:28 UTCEG score recompute
  22. 2026-09-12 08:28 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 06:21 UTCEG score recompute
  25. 2026-09-11 06:21 UTCGHSA enrichment
Show 56 more
  1. 2026-09-10 09:35 UTCEPSS rescore
  2. 2026-09-10 04:14 UTCGHSA enrichment
  3. 2026-09-09 02:08 UTCEG score recompute
  4. 2026-09-09 02:08 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 09:10 UTCEG score recompute
  7. 2026-09-07 09:09 UTCGHSA enrichment
  8. 2026-09-06 13:48 UTCEPSS rescore
  9. 2026-09-06 06:11 UTCEG score recompute
  10. 2026-09-06 06:10 UTCGHSA enrichment
  11. 2026-09-05 04:02 UTCEG score recompute
  12. 2026-09-05 04:02 UTCGHSA enrichment
  13. 2026-09-04 05:07 UTCEPSS rescore
  14. 2026-09-04 01:55 UTCGHSA enrichment
  15. 2026-09-02 23:45 UTCEG score recompute
  16. 2026-09-02 23:45 UTCGHSA enrichment
  17. 2026-09-02 14:12 UTCEPSS rescore
  18. 2026-09-01 21:39 UTCEG score recompute
  19. 2026-09-01 21:39 UTCGHSA enrichment
  20. 2026-09-01 13:54 UTCEPSS rescore
  21. 2026-08-31 19:33 UTCEG score recompute▲ 0.80
  22. 2026-08-31 19:33 UTCGHSA enrichment
  23. 2026-08-31 19:20 UTCNVD updateCVSS v3 → 5.5
  24. 2026-08-30 20:11 UTCEG score recompute
  25. 2026-08-30 20:11 UTCGHSA enrichment
  26. 2026-08-30 01:22 UTCEPSS rescore
  27. 2026-08-29 18:05 UTCEG score recompute
  28. 2026-08-29 18:05 UTCGHSA enrichment
  29. 2026-08-28 21:42 UTCEPSS rescore
  30. 2026-08-28 15:54 UTCGHSA enrichment
  31. 2026-08-28 07:29 UTCEG score recompute
  32. 2026-08-28 07:28 UTCGHSA enrichment
  33. 2026-08-27 14:25 UTCEPSS rescore
  34. 2026-08-27 05:20 UTCEG score recompute
  35. 2026-08-27 05:19 UTCGHSA enrichment
  36. 2026-08-26 14:47 UTCEPSS rescore
  37. 2026-08-26 03:11 UTCGHSA enrichment
  38. 2026-08-25 01:02 UTCEG score recompute
  39. 2026-08-25 01:02 UTCGHSA enrichment
  40. 2026-08-24 14:18 UTCEPSS rescore
  41. 2026-08-23 22:55 UTCEG score recompute
  42. 2026-08-23 22:55 UTCGHSA enrichment
  43. 2026-08-23 00:19 UTCEPSS rescore
  44. 2026-08-22 20:48 UTCEG score recompute
  45. 2026-08-22 20:48 UTCGHSA enrichment
  46. 2026-08-21 23:49 UTCEPSS rescore
  47. 2026-08-21 18:42 UTCEG score recompute
  48. 2026-08-21 18:42 UTCGHSA enrichment
  49. 2026-08-20 22:56 UTCEPSS rescore
  50. 2026-08-20 16:34 UTCEG score recompute
  51. 2026-08-20 16:34 UTCGHSA enrichment
  52. 2026-08-20 15:45 UTCEG score recompute
  53. 2026-08-20 15:45 UTCGHSA enrichment
  54. 2026-08-19 23:20 UTCEG score recompute
  55. 2026-08-19 22:43 UTCEG score recompute
  56. 2026-08-19 22:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76889?
CVE-2026-76889 is a medium vulnerability published on August 19, 2026. UMTS FP 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-2026-76889 disclosed?
CVE-2026-76889 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76889 actively exploited?
CVE-2026-76889 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 99.3% of all scored CVEs.
What is the CVSS score of CVE-2026-76889?
CVE-2026-76889 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-76889?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76889, 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-2026-76889

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