Vulnerability · Published Nov 19, 2025 · Assigned by VulnCheck
CVE-2025-34331AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Read via download.php
High 8.7
In plain English
A high-severity missing authentication in AudioCodes Fax/IVR Appliance from AudioCodes Limited. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AudioCodes Limited | AudioCodes Fax/IVR Appliance | 0 – through 2.6.23 |
Weakness: CWE-306 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
References
- https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audiocodes-auto-attendant-ivr-solution.pdf vendor-advisory, patch, mitigation
- https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html technical-description, exploit
- https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt technical-description, exploit
- https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-unauthenticated-file-read-via-download third-party-advisory