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
42%
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.

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
wolfssl4.6.0+p1-0+deb11u1 ... 5.9.2-1 (40 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
wolfssl5.5.4-2 ... 5.9.2-1 (27 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
wolfssl5.7.2-0.1 ... 5.9.2-1 (14 versions)——

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 48× 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 229 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 07:19 UTCEG score recompute
  3. 2026-09-18 07:19 UTCGHSA enrichment
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-14 01:17 UTCEG score recompute
  8. 2026-09-14 01:17 UTCGHSA enrichment
  9. 2026-09-13 09:37 UTCGHSA enrichment
  10. 2026-09-12 15:42 UTCEG score recompute
  11. 2026-09-12 15:42 UTCGHSA enrichment
  12. 2026-09-12 15:02 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 09:35 UTCEPSS rescore
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-07 16:01 UTCEPSS rescore
  17. 2026-09-06 13:47 UTCEPSS rescore
  18. 2026-09-05 15:31 UTCEPSS rescore
  19. 2026-09-04 05:07 UTCEPSS rescore
  20. 2026-09-02 14:12 UTCEPSS rescore
  21. 2026-09-01 13:54 UTCEPSS rescore
  22. 2026-09-01 04:40 UTCEPSS rescore
  23. 2026-08-30 19:30 UTCEG score recompute
  24. 2026-08-30 19:29 UTCGHSA enrichment
  25. 2026-08-30 19:17 UTCEPSS rescore
Show 75 more
  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-28 21:42 UTCEPSS rescore
  3. 2026-08-27 23:17 UTCEG score recompute
  4. 2026-08-27 23:17 UTCGHSA enrichment
  5. 2026-08-26 14:47 UTCEPSS rescore
  6. 2026-08-25 13:49 UTCEPSS rescore
  7. 2026-08-25 01:39 UTCEG score recompute
  8. 2026-08-25 01:39 UTCGHSA enrichment
  9. 2026-08-24 13:08 UTCEG score recompute
  10. 2026-08-24 13:08 UTCGHSA enrichment
  11. 2026-08-23 23:29 UTCGHSA enrichment
  12. 2026-08-23 10:58 UTCEG score recompute
  13. 2026-08-23 10:58 UTCGHSA enrichment
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-22 22:28 UTCGHSA enrichment
  16. 2026-08-22 09:57 UTCEG score recompute
  17. 2026-08-22 09:57 UTCGHSA enrichment
  18. 2026-08-21 23:49 UTCEPSS rescore
  19. 2026-08-21 20:34 UTCGHSA enrichment
  20. 2026-08-21 08:03 UTCEG score recompute
  21. 2026-08-21 08:03 UTCGHSA enrichment
  22. 2026-08-20 22:56 UTCEPSS rescore
  23. 2026-08-20 19:32 UTCGHSA enrichment
  24. 2026-08-20 07:01 UTCEG score recompute
  25. 2026-08-20 07:01 UTCGHSA enrichment
  26. 2026-08-19 17:04 UTCEPSS rescore
  27. 2026-08-19 13:43 UTCGHSA enrichment
  28. 2026-08-19 01:13 UTCEG score recompute
  29. 2026-08-19 01:13 UTCGHSA enrichment
  30. 2026-08-18 13:49 UTCEPSS rescore
  31. 2026-08-18 13:49 UTCEPSS rescore
  32. 2026-08-17 16:56 UTCEG score recompute
  33. 2026-08-17 16:56 UTCGHSA enrichment
  34. 2026-08-17 13:47 UTCEPSS rescore
  35. 2026-08-17 04:16 UTCGHSA enrichment
  36. 2026-08-16 15:45 UTCEG score recompute
  37. 2026-08-16 15:45 UTCGHSA enrichment
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 14:56 UTCEPSS rescore
  40. 2026-08-16 03:14 UTCEG score recompute
  41. 2026-08-16 03:14 UTCGHSA enrichment
  42. 2026-08-16 02:15 UTCEPSS rescore
  43. 2026-08-15 14:44 UTCGHSA enrichment
  44. 2026-08-15 02:13 UTCEG score recompute
  45. 2026-08-15 02:13 UTCGHSA enrichment
  46. 2026-08-15 01:31 UTCEPSS rescore
  47. 2026-08-14 13:43 UTCGHSA enrichment
  48. 2026-08-14 01:12 UTCEG score recompute
  49. 2026-08-14 01:12 UTCGHSA enrichment
  50. 2026-08-13 22:00 UTCEPSS rescore
  51. 2026-08-13 12:41 UTCGHSA enrichment
  52. 2026-08-13 00:10 UTCEG score recompute
  53. 2026-08-13 00:10 UTCGHSA enrichment
  54. 2026-08-12 13:51 UTCEPSS rescore
  55. 2026-08-12 11:40 UTCGHSA enrichment
  56. 2026-08-11 23:09 UTCEG score recompute
  57. 2026-08-11 23:09 UTCGHSA enrichment
  58. 2026-08-11 10:38 UTCEG score recompute
  59. 2026-08-11 10:38 UTCGHSA enrichment
  60. 2026-08-11 00:00 UTCEPSS rescore
  61. 2026-08-10 22:08 UTCGHSA enrichment
  62. 2026-08-10 09:37 UTCGHSA enrichment
  63. 2026-08-09 21:06 UTCEG score recompute
  64. 2026-08-09 21:06 UTCGHSA enrichment
  65. 2026-08-09 13:47 UTCEPSS rescore
  66. 2026-08-09 08:36 UTCGHSA enrichment
  67. 2026-08-08 20:06 UTCEG score recompute
  68. 2026-08-08 20:06 UTCGHSA enrichment
  69. 2026-08-08 16:37 UTCEPSS rescore
  70. 2026-08-08 07:35 UTCGHSA enrichment
  71. 2026-08-07 19:04 UTCEG score recompute
  72. 2026-08-07 19:04 UTCGHSA enrichment
  73. 2026-08-07 06:33 UTCGHSA enrichment
  74. 2026-08-06 18:02 UTCEG score recompute
  75. 2026-08-06 18:02 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 57.9% 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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