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.

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…

Vulnerability class: Insecure Deserialization

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.

Affected products

Sonicwall Gms — versions 9.5.1 and earlier versions

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

PSIRT@sonicwall.com (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.