Zenitel EdgeAudioClient prior 9.6.3.0/10.1.3.0 TFTP Provisioning os command injection

Summaryinfo

A vulnerability, which was classified as very critical, was found in Zenitel EdgeAudioClient. This issue affects some unknown processing of the component TFTP Provisioning Module. The manipulation of the argument DHCP option 66/config_update_tftp_server/sw_update_tftp_server results in os command injection. This vulnerability is identified as CVE-2026-95377. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Zenitel EdgeAudioClient. Affected is some unknown functionality of the component TFTP Provisioning Module. The manipulation of the argument DHCP option 66/config_update_tftp_server/sw_update_tftp_server with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as 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 before it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

OS command injection in the TFTP provisioning module of Zenitel EdgeAudioClient before 9.6.3.0, and 10.x before 10.1.3.0, on VSFF6, VSFF8, VSFF8MP, VSFF8MN, and VSFT devices allows unauthenticated adjacent attackers to execute arbitrary commands as root via a crafted DHCP option 66 (TFTP Server Name) value supplied by a rogue DHCP server on the same network segment. The DHCP-supplied value is passed to a shell without sanitization. Devices using DHCP, the default configuration, are affected on every boot and lease renewal. The same injection is also reachable via the config_update_tftp_server and sw_update_tftp_server configuration fields by an attacker able to modify the device configuration.

The advisory is available at zenitel.com. This vulnerability is traded as CVE-2026-95377 since 09/22/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/13/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 9.6.3.0 or 10.1.3.0 eliminates this vulnerability.

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Productinfo

Vendor

• Zenitel

Name

• EdgeAudioClient

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