Vulnerability · Published Aug 11, 2026 · Assigned by sonicwall
CVE-2026-66154
High 8.3
In plain English
A high-severity improper certificate validation in GMS from SonicWall. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 3.1)8.3High
Exploit odds (30 days)0.2%top 89.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-295 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0011 vendor-advisory