High severity · published Jan 9, 2026
CVE-2025-64090
Authenticated Remote Code Execution in device hostname
8.8
CVSS
0.4%
EPSS
No
On KEV
Description
This vulnerability allows authenticated attackers to execute commands via the hostname of the device.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% 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-2025-64090
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-64090
Vendor Advisory
https://www.zenitel.com/sites/default/files/2025-12/A100K12333%20Zenitel%20Security%20Advisory.pdf
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