CVE-2026-66154

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: None knownExposed: 0

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

An insufficient certificate validation in a privileged communication workflow, was identified in a GMS application 9.5.1 (Build 9510.1044) and earlier versions which, under a successful MitM attack and controlled network conditions, could permit unauthorized changes.

CVSS v3
8.3
EG Score
8.3(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity83% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 11, 2026
No patch confirmed yet.
generic

Security Advisory

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0011

Vendor Advisories for CVE-2026-66154(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 24× in last 7d / 108× 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 156 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66154?
CVE-2026-66154 is a high vulnerability published on August 11, 2026. An insufficient certificate validation in a privileged communication workflow, was identified in a GMS application 9.5.1 (Build 9510.1044) and earlier versions which, under a successful MitM attack and controlled network conditions, could permit unauthorized changes.
When was CVE-2026-66154 disclosed?
CVE-2026-66154 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66154 actively exploited?
CVE-2026-66154 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.0% of all scored CVEs.
What is the CVSS score of CVE-2026-66154?
CVE-2026-66154 has a CVSS v3.1 base score of 8.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-66154?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66154, 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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