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
41%
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 22× in last 7d / 110× 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 199 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 59.1% 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-6679

Explore →

Is Your Infrastructure Affected by CVE-2026-6679?

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

Start Free Scan →Browse All CVEs