What is CVE-2026-66146?

CVE-2026-66146 is a medium-severity vulnerability in SonicWall Gms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-11.

How severe is CVE-2026-66146?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in SonicWall Gms

CVE-2026-66146

Multiple Cross-Site Scripting (XSS) vulnerabilities were identified in GMS 9.5.1 (Build 9510.1044) and earlier versions that allow a remote attacker to execute javascript script in a user's browser.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-08-11 · last modified 2026-08-28.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.4th percentile), scored 2026-09-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

SonicWall Gms — versions 9.5.1 and earlier versions

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0011 (vendor-advisory)

Frequently asked questions

What is CVE-2026-66146?: CVE-2026-66146 is a medium-severity vulnerability in SonicWall Gms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-11.
How severe is CVE-2026-66146?: Medium severity. CVSS v3 base score is 6.1 out of 10.