Vulnerability · Published Jul 17, 2026 · Assigned by SRA

CVE-2026-9588Authenticated Stored Cross-Site Scripting (XSS) in Switchvox SMB Web Portal

High 7.0

In plain English

A high-severity cross-site scripting in Switchvox SMB Edition from Sangoma. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 4.0)7.0High

Exploit odds (30 days)0.4%top 65.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A stored cross-site scripting (XSS) vulnerability exists in Sangoma Switchvox SMB Edition 8.3 (104997) within the voicemail notification template functionality. The submit_modify_voicemail_template endpoint fails to properly sanitize HTML content supplied by authenticated users, allowing malicious JavaScript supplied through the template_text parameter to be stored server-side and subsequently rendered to other users.

Affected products (as reported)

Vendor	Product	Versions
Sangoma	Switchvox SMB Edition	8.3 (104997) – before 8.4.0.2

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:L/SA:L

References

https://sangomakb.atlassian.net/wiki/spaces/Switchvox/pages/1802371073/Switchvox+-+Release+Notes+Version+8.4.0.2+July+14+2026 release-notes
https://labs.sra.io/posts/switchvox/ third-party-advisory