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
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

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
7.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100

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%
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

Published

June 25, 2026

Last Modified

June 27, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
Fix referenced — no release confirmed yet. Sources: github_pr.
genericMentions a patch (unverified)

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 rangeFix by version rangeDependents
wolfssl4.6.0+p1-0+deb11u1 ... 5.9.2-1 (40 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wolfssl5.5.4-2 ... 5.9.2-1 (27 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wolfssl5.7.2-0.1 ... 5.9.2-1 (14 versions)
  • every version on: no fix on record
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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 247 total refreshes for this CVE.

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

Related CVEs(same product + 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 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 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-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?
A fix for CVE-2026-6679 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-6679 are linked in the Vendor Advisories panel on this page.

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