OS command injection via DHCP option 66 in Zenitel EdgeAudioClient TFTP provisioning
Summary
| CVE | CVE-2026-95377 |
|---|---|
| State | PUBLISHED |
| Assigner | Zenitel |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-13 16:19:37 UTC |
| Updated | 2026-11-13 20:19:02 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 9.4 CRITICAL from cf9c5165-6fe5-4ec0-b5f1-404f1df30a4e
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:X/RE:X/U:X
EPSS: 0.012070000 probability, percentile 0.688250000 (date 2026-11-14)
Problem Types: CWE-78 | CWE-78 CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | cf9c5165-6fe5-4ec0-b5f1-404f1df30a4e | Secondary | 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/E:X/C... |
| 4.0 | CNA | CVSS | 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 |
CVSS v4.0 Breakdown
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Zenitel | VSFF6 | affected 9.6.3.0 custom | Linux, ARM, 32 bit |
| CNA | Zenitel | VSFF6 | affected 10.0.0.0 10.1.3.0 custom | Linux, ARM, 32 bit |
| CNA | Zenitel | VSFF8 | affected 9.6.3.0 custom | Linux, ARM, 64 bit |
| CNA | Zenitel | VSFF8 | affected 10.0.0.0 10.1.3.0 custom | Linux, ARM, 64 bit |
| CNA | Zenitel | VSFF8MP | affected 9.6.3.0 custom | Linux, ARM, 64 bit |
| CNA | Zenitel | VSFF8MP | affected 10.0.0.0 10.1.3.0 custom | Linux, ARM, 64 bit |
| CNA | Zenitel | VSFF8MN | affected 9.6.3.0 custom | Linux, ARM, 64 bit |
| CNA | Zenitel | VSFF8MN | affected 10.0.0.0 10.1.3.0 custom | Linux, ARM, 64 bit |
| CNA | Zenitel | VSFT | affected 9.6.3.0 custom | Linux, ARM, 32 bit |
| CNA | Zenitel | VSFT | affected 10.0.0.0 10.1.3.0 custom | Linux, ARM, 32 bit |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.zenitel.com/sites/default/files/2026-11/A100K12404-Zenitel-Security-Advis... | cf9c5165-6fe5-4ec0-b5f1-404f1df30a4e | www.zenitel.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Reported by Kevin Schaller and Dominik Schneider from Amazon Security (en)
Additional Advisory Data
Solutions
CNA: Affected devices should upgrade to version 9.6.3.0 (and newer) or 10.1.3.0 (and newer) depending on environment.