Critical severity · published Feb 4, 2026
CVE-2025-59818
Authenticated Remote Code Execution via the file name of an uploaded file
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file name of an uploaded file.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TC
TCIS-3+ · Zenitel
<9.2.3.3 · source: vendor
TF
Tcis-3 Firmware · Zenitel
before 9.2.3.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59818
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-59818
Release Notes
https://wiki.zenitel.com/wiki/Turbine_9.3_-_Release_notes
Release Notes
https://wiki.zenitel.com/wiki/VSF-Display_Series_9.3_Release_Notes
Release Notes
https://wiki.zenitel.com/wiki/VSF-Fortitude6_9.3_Release_Notes
Release Notes
https://wiki.zenitel.com/wiki/VSF-Fortitude8_9.3_Release_Notes
Release Notes
https://wiki.zenitel.com/wiki/ZIPS_9.3_-_Release_notes
Vendor Advisory
https://www.zenitel.com/sites/default/files/2025-12/A100K12333%20Zenitel%20Security%20Advisory.pdf
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