CVE-2026-95377 PUBLISHED

OS command injection via DHCP option 66 in Zenitel EdgeAudioClient TFTP provisioning

Assigner: Zenitel
Reserved: 22.09.2026 Published: 13.11.2026 Updated: 13.11.2026

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.

Metrics

CVSS Vector: 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 Score: 9.4

Product Status

Vendor Zenitel
Product VSFF6
Versions Default: unaffected
  • affected from 0 to 9.6.3.0 (excl.)
  • affected from 10.0.0.0 to 10.1.3.0 (excl.)
Vendor Zenitel
Product VSFF8
Versions Default: unaffected
  • affected from 0 to 9.6.3.0 (excl.)
  • affected from 10.0.0.0 to 10.1.3.0 (excl.)
Vendor Zenitel
Product VSFF8MP
Versions Default: unaffected
  • affected from 0 to 9.6.3.0 (excl.)
  • affected from 10.0.0.0 to 10.1.3.0 (excl.)
Vendor Zenitel
Product VSFF8MN
Versions Default: unaffected
  • affected from 0 to 9.6.3.0 (excl.)
  • affected from 10.0.0.0 to 10.1.3.0 (excl.)
Vendor Zenitel
Product VSFT
Versions Default: unaffected
  • affected from 0 to 9.6.3.0 (excl.)
  • affected from 10.0.0.0 to 10.1.3.0 (excl.)

Solutions

Affected devices should upgrade to version 9.6.3.0 (and newer) or 10.1.3.0 (and newer) depending on environment.

Credits

  • Reported by Kevin Schaller and Dominik Schneider from Amazon Security finder

References

Problem Types

  • CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE