CVE-2025-34335 AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via ActivateLicense.php
Authenticated attackers can execute arbitrary system commands via crafted license filenames in AudioCodes Fax/IVR appliances.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34335?
CVE-2025-34335 is a high-severity command injection vulnerability in AudioCodes Fax/IVR Appliance, published on 19 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
AudioCodes Fax Server and Auto-Attendant IVR appliances 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. When a license file is uploaded, the application derives a new filename by combining a generated base name with the attacker-controlled extension portion of the original upload name, then constructs a command line for fax_server_lic_cmdline.exe that includes this path. The extension value is incorporated into the command string without input validation, escaping, or proper argument quotation before being passed to exec(). 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.
Weakness: CWE-78
Which versions are affected by CVE-2025-34335?
It affects 2 products.
Products include Audiocodes Fax Server, Audiocodes Interactive Voice Response.
How do I fix CVE-2025-34335?
No fix has been published for CVE-2025-34335 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-34335 being exploited?
There is no known exploitation of CVE-2025-34335 in the wild and no public exploit code.
Other vulnerabilities in AudioCodes Fax/IVR Appliance
- CVE-2025-34328 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Upload RCE via ajaxScript.php
- CVE-2025-34329 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated Backup Upload RCE via ajaxBackupUploadFile.php
- CVE-2025-34331 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Read via download.php
- CVE-2025-34334 AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via TestFax.php & LPE
- CVE-2025-34332 AudioCodes Fax/IVR Appliance <= 2.6.23 Insecure Service Control Scripts LPE
Sources
Also known as GHSA-38qx-8m29-gqjv.