CVE-2025-34328 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Upload RCE via ajaxScript.php
Unauthenticated attackers can upload arbitrary files to the AudioCodes Fax/IVR Appliance web directory, leading to remote code execution with SYSTEM privileges.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34328?
CVE-2025-34328 is a critical vulnerability in AudioCodes Fax/IVR Appliance, published on 19 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web administration component (F2MAdmin) that exposes an unauthenticated script-management endpoint at AudioCodes_files/utils/IVR/diagram/ajaxScript.php. The saveScript action writes attacker-supplied data directly to a server-side file path under the privileges of the web service account, which runs as NT AUTHORITY\\SYSTEM on Windows deployments. A remote, unauthenticated attacker can write arbitrary files into the product’s web-accessible directory structure and subsequently execute them.
Weakness: CWE-434
Which versions are affected by CVE-2025-34328?
It affects 2 products.
Products include Audiocodes Fax Server, Audiocodes Interactive Voice Response.
How do I fix CVE-2025-34328?
No fix has been published for CVE-2025-34328 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-34328 being exploited?
There is no known exploitation of CVE-2025-34328 in the wild and no public exploit code.
Other vulnerabilities in AudioCodes Fax/IVR Appliance
- 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-2025-34335 AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via ActivateLicense.php
- CVE-2025-34332 AudioCodes Fax/IVR Appliance <= 2.6.23 Insecure Service Control Scripts LPE
Sources
Also known as GHSA-8fgf-qm9f-cm9j.