Authenticated Command Injection in AudioCodes Fax Server and Auto-Attendant IVR Appliances
CVE-2025-34335

8.7HIGH

Key Information:

Vendor

Audiocodes Limited

Status
Audiocodes Fax/ivr Appliance
Vendor
CVE Published:
19 November 2025

What is CVE-2025-34335?

The AudioCodes Fax Server and Auto-Attendant IVR appliances, up to version 2.6.23, are susceptible to an authenticated command injection vulnerability. This issue arises during the license activation workflow when a license file is uploaded. The application improperly handles the uploaded filename by appending a generated base name to the user-controlled extension, which leads to insecure command line adjustments. Specifically, maliciously crafted extensions can be executed due to lack of input validation and escaping, enabling an attacker with authenticated access to execute arbitrary commands with the privileges of NT AUTHORITY\SYSTEM.

Affected Version(s)

AudioCodes Fax/IVR Appliance 0 <= 2.6.23

References

https://www.audiocodes.com/media/g1in2u2o/0548-product-no...
vendor-advisorypatchmitigation
https://pierrekim.github.io/blog/2025-11-20-audiocodes-fa...
technical-descriptionexploit
https://pierrekim.github.io/advisories/2025-audiocodes-fa...
technical-descriptionexploit

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pierre Barre
JSON
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CVE-2025-34335 : Authenticated Command Injection in AudioCodes Fax Server and Auto-Attendant IVR Appliances