CVE-2025-59818 Authenticated Remote Code Execution via the file name of an uploaded file
Authenticated attackers can execute arbitrary system commands via malicious file names in uploaded files on Zenitel TCIS-3+ systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59818?
CVE-2025-59818 is a critical command injection vulnerability in Zenitel TCIS-3+, published on 4 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file name of an uploaded file.
Weakness: CWE-77
Which versions are affected by CVE-2025-59818?
It affects 1 product.
Products include Zenitel Tcis-3 Firmware.
How do I fix CVE-2025-59818?
No fix has been published for CVE-2025-59818 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-59818 being exploited?
There is no known exploitation of CVE-2025-59818 in the wild and no public exploit code.
Other vulnerabilities in Zenitel TCIS-3+
Sources
Also known as GHSA-54w5-95mr-m6mw.