CVE-2026-95377
OS command injection via DHCP option 66 in Zenitel EdgeAudioClient TFTP provisioning
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.
Fixes and workarounds
Fix
Affected devices should upgrade to version 9.6.3.0 (and newer) or 10.1.3.0 (and newer) depending on environment.
Source: CNA: ZenitelAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| VSFF6 Zenitel EdgeAudioClient
Platforms: Linux, ARM, 32 bit |
≥ 0; < 9.6.3.0 (affected, custom) ≥ 10.0.0.0; < 10.1.3.0 (affected, custom) Other versions: unaffected |
CNA: Zenitel |
| VSFF8 Zenitel EdgeAudioClient
Platforms: Linux, ARM, 64 bit |
≥ 0; < 9.6.3.0 (affected, custom) ≥ 10.0.0.0; < 10.1.3.0 (affected, custom) Other versions: unaffected |
CNA: Zenitel |
| VSFF8MP Zenitel EdgeAudioClient
Platforms: Linux, ARM, 64 bit |
≥ 0; < 9.6.3.0 (affected, custom) ≥ 10.0.0.0; < 10.1.3.0 (affected, custom) Other versions: unaffected |
CNA: Zenitel |
| VSFF8MN Zenitel EdgeAudioClient
Platforms: Linux, ARM, 64 bit |
≥ 0; < 9.6.3.0 (affected, custom) ≥ 10.0.0.0; < 10.1.3.0 (affected, custom) Other versions: unaffected |
CNA: Zenitel |
| VSFT Zenitel EdgeAudioClient
Platforms: Linux, ARM, 32 bit |
≥ 0; < 9.6.3.0 (affected, custom) ≥ 10.0.0.0; < 10.1.3.0 (affected, custom) Other versions: unaffected |
CNA: Zenitel |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 9.4 critical |
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P/AU:Y | CNA: Zenitel |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
For agents and automation
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