CVE-2026-66146 identifies multiple improper input neutralization issues (CWE-79) in SonicWall GMS 9.5.1 and earlier versions. These cross-site scripting vulnerabilities enable remote attackers to inject and execute malicious JavaScript code in users' browsers when interacting with the affected web interface. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality and integrity, with no impact on availability.

Successful exploitation can lead to execution of arbitrary JavaScript in the context of the victim's browser, potentially allowing theft of sensitive information or session hijacking. The impact is limited to confidentiality and integrity with no direct availability impact. No known exploits are reported in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented. Users should monitor SonicWall advisories for updates and apply patches once available. Until then, cautious user interaction and limiting access to the management interface may reduce risk.