CVE-2026-9585 Unauthenticated Reflected Cross-Site Scripting (XSS) in Switchvox SMB Web Portal
Unauthenticated attackers can execute arbitrary scripts in victims' browsers via unsanitized input in the Switchvox SMB Web Portal.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-9585?
CVE-2026-9585 is a high-severity cross-site scripting vulnerability in Sangoma Switchvox SMB Edition, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-9585?
How do I fix CVE-2026-9585?
No fix has been published for CVE-2026-9585 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-9585 being exploited?
There is no known exploitation of CVE-2026-9585 in the wild and no public exploit code.
Sources
Also known as GHSA-34c9-mcf5-3rp3.