CVSS 4.0
9.4 criticalCVSS: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:YCVE-2026-95377 OS command injection via DHCP option 66 in Zenitel EdgeAudioClient TFTP provisioning
Critical (9.4) in zenitel.
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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.
Severity
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-78 Improper Neutralization of Special Elements used in an OS Command (OS Command Injection)
- OWASP Top 10
- A05:2025 Injection
- Published
- Modified
- Assigned by
- Zenitel (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Zenitel VSFF6 | before 9.6.3.0 |
| Zenitel VSFF6 | from 10.0.0.0 before 10.1.3.0 |
| Zenitel VSFF8 | before 9.6.3.0 |
| Zenitel VSFF8 | from 10.0.0.0 before 10.1.3.0 |
| Zenitel VSFF8MP | before 9.6.3.0 |
| Zenitel VSFF8MP | from 10.0.0.0 before 10.1.3.0 |
| Zenitel VSFF8MN | before 9.6.3.0 |
| Zenitel VSFF8MN | from 10.0.0.0 before 10.1.3.0 |
| Zenitel VSFT | before 9.6.3.0 |
| Zenitel VSFT | from 10.0.0.0 before 10.1.3.0 |
Attack patterns (CAPEC)
- CAPEC-6 Argument Injection Likelihood: High · Severity: High
- CAPEC-15 Command Delimiters Likelihood: High · Severity: High
- CAPEC-43 Exploiting Multiple Input Interpretation Layers Likelihood: Medium · Severity: High
- CAPEC-88 OS Command Injection Likelihood: High · Severity: High
- CAPEC-108 Command Line Execution through SQL Injection Likelihood: Low · Severity: Very High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.