RCE in Zenitel Tcis-3
CVE-2025-59818
This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file name of an uploaded file.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.005 (37.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Zenitel Tcis-3
- Zenitel Tcis-3+ — versions <9.2.3.3
- Zenitel Tcis-3_firmware
Weakness classification (CWE)
References
- cert@ncsc.nl (release-notes, Release Notes)
- cert@ncsc.nl (vendor-advisory, Vendor Advisory)
- cert@ncsc.nl (release-notes, Release Notes)
- cert@ncsc.nl (release-notes, Release Notes)
- cert@ncsc.nl (release-notes, Release Notes)
- cert@ncsc.nl (release-notes, Release Notes)
Frequently asked questions
- What is CVE-2025-59818?
- CVE-2025-59818 is a critical-severity vulnerability in Zenitel Tcis-3, classified under Command Injection. CVSS score: 10.0/10. Published 2026-02-04.
- How severe is CVE-2025-59818?
- Critical severity. CVSS v3 base score is 10.0 out of 10.