CVE-2025-34331 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Read via download.php
Unauthenticated attackers can read sensitive files, including credential hashes, from AudioCodes Fax/IVR appliances via the download.php endpoint.
- 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-2025-34331?
CVE-2025-34331 is a high-severity missing authorization 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 contain an unauthenticated file read vulnerability via the download.php script. The endpoint exposes a file download mechanism that lacks access control, allowing remote, unauthenticated users to request files stored on the appliance based solely on attacker-supplied path and filename parameters. While limited to specific file extensions permitted by the application logic, sensitive backup archives can be retrieved, exposing internal databases and credential hashes. Successful exploitation may lead to disclosure of administrative password hashes and other sensitive configuration data.
Weakness: CWE-306
Which versions are affected by CVE-2025-34331?
It affects 2 products.
Products include Audiocodes Fax Server, Audiocodes Interactive Voice Response.
How do I fix CVE-2025-34331?
No fix has been published for CVE-2025-34331 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-34331 being exploited?
There is no known exploitation of CVE-2025-34331 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-2025-34334 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-cm6j-j6mx-7fjj.