CVE-2025-59818: Zenitel Tcis-3 Firmware

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file name of an uploaded file.

Affected products

• Zenitel Tcis-3 Firmware: before 9.2.3.3 (fixed in 9.2.3.3)

Published 2026-02-04. Last modified 2026-06-17.