udioCodes 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.
| Link | Resource |
|---|---|
| https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt | Exploit Third Party Advisory |
| https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html | Exploit Third Party Advisory |
| https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audiocodes-auto-attendant-ivr-solution.pdf | Product |
| https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-unauthenticated-file-read-via-download | Third Party Advisory |
Configuration 1 (hide)
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12 Dec 2025, 16:05
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Audiocodes fax Server
Audiocodes Audiocodes interactive Voice Response |
|
| References | () https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt - Exploit, Third Party Advisory | |
| References | () https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html - Exploit, Third Party Advisory | |
| References | () https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audiocodes-auto-attendant-ivr-solution.pdf - Product | |
| References | () https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-unauthenticated-file-read-via-download - Third Party Advisory | |
| CPE | cpe:2.3:a:audiocodes:fax_server:*:*:*:*:*:*:*:* cpe:2.3:a:audiocodes:interactive_voice_response:*:*:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
19 Nov 2025, 17:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2025-11-19 17:15
Updated : 2025-12-12 16:05
NVD link : CVE-2025-34331
Mitre link : CVE-2025-34331
CVE.ORG link : CVE-2025-34331
JSON object : View
Missing Authentication for Critical Function