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% (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 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.

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
5.5MEDIUMmedium 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

September 17, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available.
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 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 / 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.

Showing the most recent 100 of 116 total refreshes for this CVE.

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

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 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 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-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?
A fix for CVE-2026-76889 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76889 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76889

Explore →

Is Your Infrastructure Affected by CVE-2026-76889?

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

Book a Demo →Browse All CVEs