CVE-2026-15165

MEDIUMNVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-07-08. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 sources updated this weekElevated
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

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

TLS ECH decryptor crash in Wireshark 4.6.0 to 4.6.6 allows denial of service

CVSS v3
5.5
EG Score
5.5(high)
EPSS
3.2%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 10, 2026

Advisory Details (1)

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

[Security] TLS ECH transcript reconstruction: heap buffer overflow via repeated ech_outer_extensions (#21390) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21390

Vendor Advisories for CVE-2026-15165(1)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 18× 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. 2026-07-13 15:36 UTCEG score recompute
  2. 2026-07-13 15:36 UTCGHSA enrichment
  3. 2026-07-13 06:12 UTCEPSS rescore
  4. 2026-07-12 16:43 UTCEG score recompute
  5. 2026-07-12 16:43 UTCGHSA enrichment
  6. 2026-07-12 05:46 UTCEPSS rescore
  7. 2026-07-11 17:51 UTCEG score recompute
  8. 2026-07-11 17:51 UTCGHSA enrichment
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-10 18:59 UTCEG score recompute
  11. 2026-07-10 18:59 UTCGHSA enrichment
  12. 2026-07-10 14:18 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  13. 2026-07-09 21:46 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  14. 2026-07-09 20:06 UTCEG score recompute
  15. 2026-07-09 20:05 UTCGHSA enrichment
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-08 21:12 UTCEG score recompute
  18. 2026-07-08 21:10 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15165?
CVE-2026-15165 is a medium vulnerability published on July 8, 2026. TLS ECH decryptor crash in Wireshark 4.6.0 to 4.6.6 allows denial of service
When was CVE-2026-15165 disclosed?
CVE-2026-15165 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15165 actively exploited?
CVE-2026-15165 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-15165?
CVE-2026-15165 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-15165?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15165, 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

Explore the affected products and dependency analysis for CVE-2026-15165

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