CVE-2026-8673

CRITICALNVD 9.15.9▼
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-05-26. NVD baseline CVSS 9.1; sources differ by 3.2.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

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

Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks.

This issue affects Avantra: before 25.3.0.

CVSS v3
9.1
EG Score
5.9(medium)
EPSS
9.0%
KEV
Not listed

Published

May 26, 2026

Last Modified

June 2, 2026

References (1)

Vendor Advisories for CVE-2026-8673(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 7× in last 7d / 47× 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 106 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:31 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 02:23 UTCEPSS rescore
  13. 2026-07-06 02:23 UTCEPSS rescore
  14. 2026-07-05 02:31 UTCEPSS rescore
  15. 2026-07-05 02:30 UTCEPSS rescore
  16. 2026-07-04 06:31 UTCEPSS rescore
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-01 15:07 UTCEPSS rescore
  19. 2026-07-01 14:28 UTCEG score recompute
  20. 2026-07-01 14:28 UTCGHSA enrichment
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 01:00 UTCEG score recompute
  24. 2026-06-29 01:00 UTCGHSA enrichment
  25. 2026-06-28 14:07 UTCEPSS rescore
Show 75 more
  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-27 19:00 UTCEG score recompute
  3. 2026-06-27 19:00 UTCGHSA enrichment
  4. 2026-06-27 03:08 UTCEPSS rescore
  5. 2026-06-26 18:31 UTCEG score recompute
  6. 2026-06-26 18:31 UTCGHSA enrichment
  7. 2026-06-25 13:50 UTCEPSS rescore
  8. 2026-06-25 12:23 UTCEG score recompute
  9. 2026-06-25 12:23 UTCGHSA enrichment
  10. 2026-06-24 14:05 UTCEPSS rescore
  11. 2026-06-23 21:33 UTCEPSS rescore
  12. 2026-06-22 14:25 UTCEPSS rescore
  13. 2026-06-21 14:56 UTCEPSS rescore
  14. 2026-06-21 01:59 UTCEPSS rescore
  15. 2026-06-19 19:26 UTCEPSS rescore
  16. 2026-06-18 17:52 UTCEPSS rescore
  17. 2026-06-17 19:24 UTCEG score recompute
  18. 2026-06-17 19:24 UTCGHSA enrichment
  19. 2026-06-17 17:53 UTCEPSS rescore
  20. 2026-06-16 17:53 UTCEPSS rescore
  21. 2026-06-16 17:26 UTCEG score recompute
  22. 2026-06-16 17:25 UTCGHSA enrichment
  23. 2026-06-15 17:49 UTCEPSS rescore
  24. 2026-06-15 17:49 UTCEPSS rescore
  25. 2026-06-15 13:55 UTCEG score recompute
  26. 2026-06-15 13:55 UTCGHSA enrichment
  27. 2026-06-14 23:18 UTCEPSS rescore
  28. 2026-06-14 13:24 UTCEG score recompute
  29. 2026-06-14 13:24 UTCGHSA enrichment
  30. 2026-06-13 23:00 UTCEPSS rescore
  31. 2026-06-13 14:30 UTCEG score recompute
  32. 2026-06-13 14:30 UTCGHSA enrichment
  33. 2026-06-12 23:12 UTCEPSS rescore
  34. 2026-06-12 23:12 UTCEPSS rescore
  35. 2026-06-12 15:34 UTCEG score recompute
  36. 2026-06-12 15:34 UTCGHSA enrichment
  37. 2026-06-11 16:40 UTCEG score recompute
  38. 2026-06-11 16:40 UTCGHSA enrichment
  39. 2026-06-11 14:00 UTCEPSS rescore
  40. 2026-06-10 22:19 UTCEPSS rescore
  41. 2026-06-10 16:56 UTCEG score recompute
  42. 2026-06-10 16:56 UTCGHSA enrichment
  43. 2026-06-10 13:22 UTCEPSS rescore
  44. 2026-06-09 18:03 UTCEG score recompute
  45. 2026-06-09 18:03 UTCGHSA enrichment
  46. 2026-06-08 23:31 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  47. 2026-06-08 19:09 UTCEG score recompute
  48. 2026-06-08 19:09 UTCGHSA enrichment
  49. 2026-06-08 14:17 UTCEPSS rescore
  50. 2026-06-07 18:28 UTCEG score recompute
  51. 2026-06-07 18:28 UTCGHSA enrichment
  52. 2026-06-07 15:25 UTCEPSS rescore
  53. 2026-06-06 19:34 UTCEG score recompute
  54. 2026-06-06 19:34 UTCGHSA enrichment
  55. 2026-06-06 13:47 UTCEPSS rescore
  56. 2026-06-05 22:47 UTCEPSS rescore
  57. 2026-06-05 20:40 UTCEG score recompute
  58. 2026-06-05 20:40 UTCGHSA enrichment
  59. 2026-06-05 06:10 UTCEPSS rescore
  60. 2026-06-04 21:46 UTCEG score recompute
  61. 2026-06-04 21:46 UTCGHSA enrichment
  62. 2026-06-04 13:12 UTCEPSS rescore
  63. 2026-06-03 22:52 UTCEG score recompute
  64. 2026-06-03 22:52 UTCGHSA enrichment
  65. 2026-06-02 23:58 UTCEG score recompute
  66. 2026-06-02 23:58 UTCGHSA enrichment
  67. 2026-06-02 20:13 UTCEPSS rescore
  68. 2026-06-02 01:04 UTCEG score recompute
  69. 2026-06-02 01:04 UTCGHSA enrichment
  70. 2026-06-01 13:52 UTCEPSS rescore
  71. 2026-06-01 02:10 UTCEG score recompute
  72. 2026-06-01 02:10 UTCGHSA enrichment
  73. 2026-05-31 22:30 UTCEPSS rescore
  74. 2026-05-31 00:16 UTCEPSS rescore
  75. 2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-8673?
CVE-2026-8673 is a critical vulnerability published on May 26, 2026. Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks. This issue affects Avantra: before 25.3.0.
When was CVE-2026-8673 disclosed?
CVE-2026-8673 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on June 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8673 actively exploited?
CVE-2026-8673 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8673?
CVE-2026-8673 has a CVSS v3 base score of 9.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 5.9.
How do I remediate CVE-2026-8673?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8673, 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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