CVE-2025-64090
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-09

Last updated on: 2026-02-12

Assigner: National Cyber Security Centre Netherlands (NCSC-NL)

Description
This vulnerability allows authenticated attackers to execute commands via the hostname of the device.
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Meta Information
Published
2026-01-09
Last Modified
2026-02-12
Generated
2026-06-16
AI Q&A
2026-01-10
EPSS Evaluated
2026-06-14
NVD
CVE-2025-64090
EUVD
EUVD-2026-1758
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
zenitel tcis-3_firmware to 9.2.3.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
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Executive Summary

This vulnerability affects Zenitel VS-IS firmware and allows authenticated attackers with administrative access to execute commands via the device's hostname. It stems from legacy web interface components that lacked sufficient input validation, enabling command execution through crafted hostname input. [1]

Impact Analysis

An attacker exploiting this vulnerability could execute arbitrary commands on the affected device, potentially leading to full compromise of the system. Given the CVSS score of 10.0, the impact includes complete confidentiality, integrity, and availability loss, which could disrupt device operations and expose sensitive information. [1]

Mitigation Strategies

To mitigate this vulnerability, immediately upgrade all affected Zenitel VS-IS firmware devices to version 9.3.3.1 or later (for general VS-IS firmware) or version 8.2.3.5 or later (for TCIV). No further mitigation steps are necessary after applying these firmware updates. [1]

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