CVE-2026-15170

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-08. 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 weekElevated
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: Elevated riskExposed: 0

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

Z39.50 protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

[Security] Z39.50 MARC21 dissector: heap overflow (directory entry count floor/ceil mismatch) in dissect_marc_record() (ANT-2026-3FWTCMVC) (#21397) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21397

Vendor Advisories for CVE-2026-15170(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
wireshark3.4.10-0+deb11u1 ... 4.6.6-2 (69 versions)——
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 ... 4.6.6-2 (20 versions)——
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 16× in last 7d / 75× 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. 2026-08-30 07:28 UTCEG score recompute
  2. 2026-08-30 07:28 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-28 02:48 UTCEG score recompute
  6. 2026-08-28 02:48 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-27 01:21 UTCEG score recompute
  9. 2026-08-27 01:21 UTCGHSA enrichment
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-25 14:48 UTCEG score recompute
  12. 2026-08-25 14:48 UTCGHSA enrichment
  13. 2026-08-25 13:48 UTCEPSS rescore
  14. 2026-08-24 12:37 UTCEG score recompute
  15. 2026-08-24 12:37 UTCGHSA enrichment
  16. 2026-08-23 10:34 UTCGHSA enrichment
  17. 2026-08-22 09:05 UTCEG score recompute
  18. 2026-08-22 09:05 UTCGHSA enrichment
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 07:37 UTCGHSA enrichment
  21. 2026-08-20 06:09 UTCEG score recompute
  22. 2026-08-20 06:09 UTCGHSA enrichment
  23. 2026-08-19 17:03 UTCEPSS rescore
  24. 2026-08-19 04:40 UTCEG score recompute
  25. 2026-08-19 04:40 UTCGHSA enrichment
Show 75 more
  1. 2026-08-18 13:48 UTCEPSS rescore
  2. 2026-08-18 02:57 UTCEG score recompute
  3. 2026-08-18 02:57 UTCGHSA enrichment
  4. 2026-08-17 13:47 UTCEPSS rescore
  5. 2026-08-16 22:48 UTCEG score recompute
  6. 2026-08-16 22:48 UTCGHSA enrichment
  7. 2026-08-16 14:56 UTCEPSS rescore
  8. 2026-08-16 02:14 UTCEPSS rescore
  9. 2026-08-15 21:20 UTCEG score recompute
  10. 2026-08-15 21:20 UTCGHSA enrichment
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-14 19:51 UTCEG score recompute
  13. 2026-08-14 19:51 UTCGHSA enrichment
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 18:23 UTCGHSA enrichment
  16. 2026-08-12 16:55 UTCEG score recompute
  17. 2026-08-12 16:55 UTCGHSA enrichment
  18. 2026-08-12 13:50 UTCEPSS rescore
  19. 2026-08-11 15:28 UTCEG score recompute
  20. 2026-08-11 15:28 UTCGHSA enrichment
  21. 2026-08-11 13:42 UTCEPSS rescore
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-10 14:00 UTCEG score recompute
  24. 2026-08-10 14:00 UTCGHSA enrichment
  25. 2026-08-09 13:46 UTCEPSS rescore
  26. 2026-08-09 12:32 UTCEG score recompute
  27. 2026-08-09 12:32 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 11:04 UTCEG score recompute
  30. 2026-08-08 11:04 UTCGHSA enrichment
  31. 2026-08-07 09:36 UTCEG score recompute
  32. 2026-08-07 09:36 UTCGHSA enrichment
  33. 2026-08-06 13:46 UTCEPSS rescore
  34. 2026-08-06 08:08 UTCEG score recompute
  35. 2026-08-06 08:08 UTCGHSA enrichment
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 06:40 UTCEG score recompute
  38. 2026-08-05 06:40 UTCGHSA enrichment
  39. 2026-08-04 15:10 UTCEPSS rescore
  40. 2026-08-04 10:38 UTCEPSS rescore
  41. 2026-08-04 03:49 UTCEG score recompute
  42. 2026-08-04 03:49 UTCGHSA enrichment
  43. 2026-08-03 10:35 UTCEPSS rescore
  44. 2026-08-03 02:21 UTCEG score recompute
  45. 2026-08-03 02:21 UTCGHSA enrichment
  46. 2026-08-02 02:26 UTCEPSS rescore
  47. 2026-08-02 00:53 UTCEG score recompute
  48. 2026-08-02 00:53 UTCGHSA enrichment
  49. 2026-08-01 04:15 UTCEPSS rescore
  50. 2026-07-31 23:24 UTCGHSA enrichment
  51. 2026-07-30 21:52 UTCEG score recompute
  52. 2026-07-30 21:52 UTCGHSA enrichment
  53. 2026-07-30 16:27 UTCEPSS rescore
  54. 2026-07-30 01:30 UTCEPSS rescore
  55. 2026-07-29 19:04 UTCGHSA enrichment
  56. 2026-07-28 17:15 UTCEG score recompute
  57. 2026-07-28 17:15 UTCGHSA enrichment
  58. 2026-07-28 15:36 UTCEPSS rescore
  59. 2026-07-27 15:38 UTCEG score recompute
  60. 2026-07-27 15:38 UTCGHSA enrichment
  61. 2026-07-27 14:13 UTCEPSS rescore
  62. 2026-07-26 14:54 UTCEPSS rescore
  63. 2026-07-26 14:54 UTCEPSS rescore
  64. 2026-07-26 12:24 UTCEG score recompute
  65. 2026-07-26 12:24 UTCGHSA enrichment
  66. 2026-07-25 14:17 UTCEPSS rescore
  67. 2026-07-24 14:17 UTCEPSS rescore
  68. 2026-07-23 14:18 UTCEPSS rescore
  69. 2026-07-23 03:05 UTCEG score recompute
  70. 2026-07-22 14:08 UTCEPSS rescore
  71. 2026-07-21 15:24 UTCEPSS rescore
  72. 2026-07-20 17:08 UTCEPSS rescore
  73. 2026-07-19 14:30 UTCEPSS rescore
  74. 2026-07-18 10:04 UTCEPSS rescore
  75. 2026-07-16 17:02 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15170?
CVE-2026-15170 is a medium vulnerability published on July 8, 2026. Z39.50 protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
When was CVE-2026-15170 disclosed?
CVE-2026-15170 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15170 actively exploited?
CVE-2026-15170 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 94.9% of all scored CVEs.
What is the CVSS score of CVE-2026-15170?
CVE-2026-15170 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-15170?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15170, 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-2026-15170

Explore →

Is Your Infrastructure Affected by CVE-2026-15170?

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

Start Free Scan →Browse All CVEs