CVE-2026-6679

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

A heap buffer overflow could occur in the DTLS 1.3 ACK serialization path before the connecting peer is authenticated. The buffer overflow was due to an integer truncation when computing the length of the ACK record-number list, causing an undersized buffer to be allocated and then overrun. This affects builds using DTLS 1.3 and wolfSSL version 5.9.0 and earlier. A fix was added to the 5.9.1 release.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 27, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
Patch available. Sources: github_pr.
generic Patch Available

wolfSSL Security Vulnerabilities | Documentation - wolfSSL

https://www.wolfssl.com/docs/security-vulnerabilities/
github_pr

Additional fixes

Fix merged in wolfSSL/wolfssl PR #10116 on 2026-04-07 — awaiting tagged release

https://github.com/wolfSSL/wolfssl/pull/10116

Vendor Advisories for CVE-2026-6679(1)

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

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 83× 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. 2026-07-27 03:42 UTCGHSA enrichment
  2. 2026-07-26 14:54 UTCEG score recompute
  3. 2026-07-26 14:54 UTCGHSA enrichment
  4. 2026-07-26 14:54 UTCEPSS rescore
  5. 2026-07-25 14:18 UTCEPSS rescore
  6. 2026-07-24 14:18 UTCEPSS rescore
  7. 2026-07-24 14:18 UTCEPSS rescore
  8. 2026-07-23 14:18 UTCEPSS rescore
  9. 2026-07-23 14:18 UTCEPSS rescore
  10. 2026-07-23 03:22 UTCEG score recompute
  11. 2026-07-22 14:08 UTCEPSS rescore
  12. 2026-07-22 14:08 UTCEPSS rescore
  13. 2026-07-21 15:25 UTCEPSS rescore
  14. 2026-07-21 15:25 UTCEPSS rescore
  15. 2026-07-20 17:08 UTCEPSS rescore
  16. 2026-07-19 14:31 UTCEPSS rescore
  17. 2026-07-19 02:29 UTCEPSS rescore
  18. 2026-07-18 10:04 UTCEPSS rescore
  19. 2026-07-17 02:18 UTCGHSA enrichment
  20. 2026-07-16 17:03 UTCEPSS rescore
  21. 2026-07-16 13:30 UTCGHSA enrichment
  22. 2026-07-16 00:53 UTCGHSA enrichment
  23. 2026-07-15 16:57 UTCEPSS rescore
  24. 2026-07-15 12:22 UTCGHSA enrichment
  25. 2026-07-15 02:00 UTCEPSS rescore
Show 65 more
  1. 2026-07-14 23:49 UTCGHSA enrichment
  2. 2026-07-14 11:18 UTCGHSA enrichment
  3. 2026-07-13 22:47 UTCGHSA enrichment
  4. 2026-07-13 22:31 UTCEPSS rescore
  5. 2026-07-13 10:14 UTCGHSA enrichment
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 21:43 UTCGHSA enrichment
  9. 2026-07-12 09:12 UTCGHSA enrichment
  10. 2026-07-12 05:46 UTCEPSS rescore
  11. 2026-07-11 20:41 UTCGHSA enrichment
  12. 2026-07-11 08:27 UTCEPSS rescore
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-11 08:10 UTCGHSA enrichment
  15. 2026-07-10 19:39 UTCGHSA enrichment
  16. 2026-07-10 07:08 UTCGHSA enrichment
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-09 19:10 UTCEPSS rescore
  19. 2026-07-09 18:34 UTCGHSA enrichment
  20. 2026-07-09 05:59 UTCGHSA enrichment
  21. 2026-07-08 17:24 UTCGHSA enrichment
  22. 2026-07-08 15:16 UTCEPSS rescore
  23. 2026-07-08 15:16 UTCEPSS rescore
  24. 2026-07-08 04:53 UTCGHSA enrichment
  25. 2026-07-07 16:13 UTCGHSA enrichment
  26. 2026-07-07 13:46 UTCEPSS rescore
  27. 2026-07-07 13:46 UTCEPSS rescore
  28. 2026-07-07 02:21 UTCGHSA enrichment
  29. 2026-07-06 16:27 UTCEPSS rescore
  30. 2026-07-06 16:27 UTCEPSS rescore
  31. 2026-07-06 13:50 UTCGHSA enrichment
  32. 2026-07-06 02:23 UTCEPSS rescore
  33. 2026-07-06 02:23 UTCEPSS rescore
  34. 2026-07-06 01:18 UTCGHSA enrichment
  35. 2026-07-05 12:46 UTCGHSA enrichment
  36. 2026-07-05 00:15 UTCGHSA enrichment
  37. 2026-07-04 11:42 UTCGHSA enrichment
  38. 2026-07-04 06:31 UTCEPSS rescore
  39. 2026-07-04 06:31 UTCEPSS rescore
  40. 2026-07-03 23:11 UTCGHSA enrichment
  41. 2026-07-03 10:39 UTCGHSA enrichment
  42. 2026-07-02 22:00 UTCGHSA enrichment
  43. 2026-07-02 09:29 UTCGHSA enrichment
  44. 2026-07-01 20:58 UTCGHSA enrichment
  45. 2026-07-01 15:07 UTCEPSS rescore
  46. 2026-07-01 08:28 UTCGHSA enrichment
  47. 2026-06-30 23:22 UTCEPSS rescore
  48. 2026-06-30 19:57 UTCGHSA enrichment
  49. 2026-06-30 07:26 UTCGHSA enrichment
  50. 2026-06-29 18:54 UTCGHSA enrichment
  51. 2026-06-29 06:23 UTCGHSA enrichment
  52. 2026-06-28 17:48 UTCGHSA enrichment
  53. 2026-06-28 14:07 UTCEPSS rescore
  54. 2026-06-28 05:17 UTCEG score recompute▼ 1.30
  55. 2026-06-28 05:17 UTCGHSA enrichment
  56. 2026-06-28 04:56 UTCEPSS rescore
  57. 2026-06-27 21:42 UTCNVD updateCVSS v3 → 7.5
  58. 2026-06-27 16:46 UTCGHSA enrichment
  59. 2026-06-27 04:15 UTCGHSA enrichment
  60. 2026-06-27 03:08 UTCEPSS rescore
  61. 2026-06-26 15:44 UTCEG score recompute▲ 8.80
  62. 2026-06-26 15:44 UTCGHSA enrichment
  63. 2026-06-26 15:40 UTCNVD updateCVSS v3 → 8.8 · CVSS v4 → 8.8
  64. 2026-06-25 21:46 UTCEG score recompute
  65. 2026-06-25 21:46 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-6679?
CVE-2026-6679 is a high vulnerability published on June 25, 2026. A heap buffer overflow could occur in the DTLS 1.3 ACK serialization path before the connecting peer is authenticated. The buffer overflow was due to an integer truncation when computing the length of the ACK record-number list, causing an undersized buffer to be allocated and then overrun. This…
When was CVE-2026-6679 disclosed?
CVE-2026-6679 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6679 actively exploited?
CVE-2026-6679 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.9% of all scored CVEs.
What is the CVSS score of CVE-2026-6679?
CVE-2026-6679 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-6679?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6679, 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

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