Deserialization in SonicWall Gms
CVE-2026-18634
An insecure handling of serialized objects vulnerability was found in the one of the service of GMS application 9.5.1 (Build 9510.1044) and earlier versions. A local attacker with the ability to interact with the service could exploit this behavior to perform unauthorized actions through the affected component.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- SonicWall Gms — versions 9.5.1 and earlier versions
Weakness classification (CWE)
References
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0011 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-18634?
- CVE-2026-18634 is a high-severity vulnerability in SonicWall Gms, classified under Deserialization of Untrusted Data. CVSS score: 8.4/10. Published 2026-08-11.
- How severe is CVE-2026-18634?
- High severity. CVSS v3 base score is 8.4 out of 10.