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Vulnerability record · CVE-2026-66154 · published 11 August 2026

CVE-2026-66154: Improper certificate validation vulnerability

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.

8.3 CVSS 3.1 High EPSS 0.20% · top 91.0% CWE-295 · Improper certificate validation Awaiting Analysis
8.3CVSS 3.1 base score
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
28 Aug 2026Last modified by NVD

Description

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:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-66154), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.