CVE-2025-34335: fax server through 2.6.23 (inclusive); +2 more affected products

Affected technology

fax server · through 2.6.23 (inclusive)
audiocodes

interactive voice response · before 2.6.23 (exclusive)
audiocodes

AudioCodes Fax/IVR Appliance · 0 through 2.6.23
AudioCodes Limited

Description’s affected range: versions up to and including 2.6.23 expose an authenticated command injection vulnerability in the license activation workflow handled by AudioCodes_files/ActivateLicense.php

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

An authenticated user with access to the license upload interface can supply a specially crafted filename whose extension injects additional shell metacharacters, causing arbitrary commands to be executed as NT AUTHORITY\\SYSTEM. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality, integrity and availability impact as high.