Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Audiocodes | Fax Server | <= 2.6.23 |
| Audiocodes | Interactive Voice Response | <= 2.6.23 |
Related Weaknesses (CWE)
References
- https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txtExploitThird Party Advisory
- https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilitiesExploitThird Party Advisory
- https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-forProduct
- https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-unauthenticateThird Party Advisory
FAQ
What is CVE-2025-34331?
CVE-2025-34331 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2025-34331?
CVE-2025-34331 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-34331?
Check the references section above for vendor advisories and patch information. Affected products include: Audiocodes Fax Server, Audiocodes Interactive Voice Response.