CVE-2025-64091

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 NTP-configuration of the device.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-01-09

Last Modified

2026-02-12

Generated

2026-07-06

AI Q&A

2026-01-10

EPSS Evaluated

2026-07-05

NVD

CVE-2025-64091

EUVD

EUVD-2026-1764

Affected Vendors & Products

Vendor	Product	Version / Range
zenitel	tcis-3_firmware	to 9.2.3.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability allows authenticated attackers to execute commands on the device via its NTP configuration. Essentially, if an attacker has valid access, they can exploit the Network Time Protocol settings to run unauthorized commands on the affected device.

Impact Analysis

The vulnerability can lead to unauthorized command execution on the device, which may compromise the device's integrity and security. This could allow attackers to manipulate device behavior or gain further access within the network, potentially leading to significant security risks.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade all affected Zenitel VS-IS firmware devices to version 9.3.3.1 or later, or version 8.2.3.5 or later for TCIV devices. After updating to these fixed firmware versions, no further mitigation is necessary. [1]

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