CVE-2026-76891

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

Crash in sharkd in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 31, 2026
No patch confirmed yet.
generic

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-64 Sharkd utility crash

https://www.wireshark.org/security/wnpa-sec-2026-64.html
generic

sharkd: use-after-return via dangling stack-object rtp-streams tap listener on error path (ANT-2026-27KVBTTP) (#21395) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21395

Vendor Advisories for CVE-2026-76891(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 18× in last 7d / 67× 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. 2026-09-18 21:40 UTCEG score recompute
  2. 2026-09-18 21:40 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 19:04 UTCGHSA enrichment
  5. 2026-09-16 20:03 UTCEG score recompute
  6. 2026-09-16 20:03 UTCGHSA enrichment
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 16:47 UTCEG score recompute
  10. 2026-09-15 16:46 UTCGHSA enrichment
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-14 15:20 UTCEG score recompute
  13. 2026-09-14 15:20 UTCGHSA enrichment
  14. 2026-09-13 13:53 UTCEG score recompute
  15. 2026-09-13 13:53 UTCGHSA enrichment
  16. 2026-09-12 15:02 UTCEPSS rescore
  17. 2026-09-12 12:28 UTCEG score recompute
  18. 2026-09-12 12:28 UTCGHSA enrichment
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-11 11:02 UTCEG score recompute
  21. 2026-09-11 11:02 UTCGHSA enrichment
  22. 2026-09-10 09:35 UTCEPSS rescore
  23. 2026-09-10 08:52 UTCGHSA enrichment
  24. 2026-09-09 07:25 UTCGHSA enrichment
  25. 2026-09-08 06:00 UTCEG score recompute
Show 45 more
  1. 2026-09-08 06:00 UTCGHSA enrichment
  2. 2026-09-07 04:33 UTCEG score recompute
  3. 2026-09-07 04:33 UTCGHSA enrichment
  4. 2026-09-06 13:48 UTCEPSS rescore
  5. 2026-09-06 02:57 UTCEG score recompute
  6. 2026-09-06 02:57 UTCGHSA enrichment
  7. 2026-09-05 01:32 UTCEG score recompute
  8. 2026-09-05 01:32 UTCGHSA enrichment
  9. 2026-09-04 05:07 UTCEPSS rescore
  10. 2026-09-04 00:06 UTCGHSA enrichment
  11. 2026-09-02 22:38 UTCEG score recompute
  12. 2026-09-02 22:38 UTCGHSA enrichment
  13. 2026-09-02 14:12 UTCEPSS rescore
  14. 2026-09-01 21:12 UTCEG score recompute
  15. 2026-09-01 21:12 UTCGHSA enrichment
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-08-31 19:33 UTCEG score recompute▲ 3.40
  18. 2026-08-31 19:33 UTCGHSA enrichment
  19. 2026-08-31 19:20 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  20. 2026-08-31 08:56 UTCEG score recompute
  21. 2026-08-31 08:56 UTCGHSA enrichment
  22. 2026-08-30 19:18 UTCEPSS rescore
  23. 2026-08-30 19:17 UTCEPSS rescore
  24. 2026-08-30 01:22 UTCEPSS rescore
  25. 2026-08-28 21:42 UTCEPSS rescore
  26. 2026-08-28 15:54 UTCEG score recompute
  27. 2026-08-28 15:54 UTCGHSA enrichment
  28. 2026-08-27 14:25 UTCEPSS rescore
  29. 2026-08-26 14:47 UTCEPSS rescore
  30. 2026-08-26 02:21 UTCEG score recompute
  31. 2026-08-26 02:21 UTCGHSA enrichment
  32. 2026-08-25 13:49 UTCEPSS rescore
  33. 2026-08-24 14:18 UTCEPSS rescore
  34. 2026-08-23 09:28 UTCEG score recompute
  35. 2026-08-23 09:28 UTCGHSA enrichment
  36. 2026-08-23 00:19 UTCEPSS rescore
  37. 2026-08-21 23:49 UTCEPSS rescore
  38. 2026-08-20 22:56 UTCEPSS rescore
  39. 2026-08-20 16:34 UTCEG score recompute
  40. 2026-08-20 16:34 UTCGHSA enrichment
  41. 2026-08-20 15:45 UTCEG score recompute
  42. 2026-08-20 15:45 UTCGHSA enrichment
  43. 2026-08-19 23:20 UTCEG score recompute
  44. 2026-08-19 22:53 UTCEG score recompute
  45. 2026-08-19 22:52 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-76891?
CVE-2026-76891 is a medium vulnerability published on August 19, 2026. Crash in sharkd in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
When was CVE-2026-76891 disclosed?
CVE-2026-76891 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-2026-76891 actively exploited?
CVE-2026-76891 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 91.6% of all scored CVEs.
What is the CVSS score of CVE-2026-76891?
CVE-2026-76891 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-76891?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76891, 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-2026-76891

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