CVE-2026-9585: Sangoma Switchvox SMB Edition

High severity, CVSS 8.6. EPSS: 0.6% chance of exploitation in the next 30 days.

An unauthenticated reflected cross-site scripting (XSS) vulnerability exists in Sangoma Switchvox SMB Edition version 8.3 (104997). The application fails to properly sanitize the portal parameter supplied to the invalid_browser and invalid_browser_login handlers. User-supplied data is reflected into JavaScript generated by the application, allowing attacker-controlled script execution within a victim's browser.

Affected products

• Sangoma Switchvox SMB Edition: from 8.3 (104997), before 8.4.0.2 (fixed in 8.4.0.2)

Published 2026-07-17. Last modified 2026-07-17.