CVE-2026-66154

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH 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(high)
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 12, 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 29× 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.

  1. 2026-08-21 06:00 UTCEG score recompute
  2. 2026-08-21 06:00 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 19:08 UTCGHSA enrichment
  5. 2026-08-20 08:16 UTCGHSA enrichment
  6. 2026-08-19 21:25 UTCEG score recompute
  7. 2026-08-19 21:25 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 10:28 UTCGHSA enrichment
  10. 2026-08-18 23:37 UTCEG score recompute
  11. 2026-08-18 23:37 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 12:45 UTCGHSA enrichment
  14. 2026-08-18 01:42 UTCGHSA enrichment
  15. 2026-08-17 14:51 UTCEG score recompute
  16. 2026-08-17 14:51 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 04:00 UTCGHSA enrichment
  19. 2026-08-16 17:09 UTCEG score recompute
  20. 2026-08-16 17:09 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 06:17 UTCEG score recompute
  23. 2026-08-16 06:17 UTCGHSA enrichment
  24. 2026-08-15 19:26 UTCGHSA enrichment
  25. 2026-08-15 08:35 UTCEG score recompute
Show 22 more
  1. 2026-08-15 08:35 UTCGHSA enrichment
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 21:43 UTCGHSA enrichment
  4. 2026-08-14 10:52 UTCGHSA enrichment
  5. 2026-08-14 00:01 UTCEG score recompute
  6. 2026-08-14 00:01 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 13:09 UTCGHSA enrichment
  9. 2026-08-13 02:18 UTCGHSA enrichment
  10. 2026-08-12 15:26 UTCGHSA enrichment
  11. 2026-08-12 15:13 UTCEG score recompute
  12. 2026-08-12 15:13 UTCGHSA enrichment
  13. 2026-08-12 13:51 UTCEPSS rescore
  14. 2026-08-12 05:29 UTCGHSA enrichment
  15. 2026-08-12 04:20 UTCEG score recompute
  16. 2026-08-12 04:20 UTCGHSA enrichment
  17. 2026-08-11 22:20 UTCEG score recompute▲ 8.30
  18. 2026-08-11 22:20 UTCGHSA enrichment
  19. 2026-08-11 22:20 UTCNVD updateCVSS v3 → 8.3 · severity → HIGH
  20. 2026-08-11 21:18 UTCNVD update
  21. 2026-08-11 20:30 UTCEG score recompute
  22. 2026-08-11 20:30 UTCMITRE cvelistV5first tracked

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 12, 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 96.9% 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

Explore the affected products and dependency analysis for CVE-2026-66154

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