CVE-2025-34328

AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web administration component (F2MAdmin) that exposes an unauthenticated script-management endpoint at AudioCodes_files/utils/IVR/diagram/ajaxScript.php. The saveScript action writes attacker-supplied data directly to a server-side file path under the privileges of the web service account, which runs as NT AUTHORITY\\SYSTEM on Windows deployments. A remote, unauthenticated attacker can write arbitrary files into the product’s web-accessible directory structure and subsequently execute them.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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-upload-rce-via-ajaxscript	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:audiocodes:fax_server::::::::
	cpe:2.3:a:audiocodes:interactive_voice_response::::::::

History

No history.

Information

Published : 2025-11-19 17:15

Updated : 2025-12-12 16:10

NVD link : CVE-2025-34328

Mitre link : CVE-2025-34328

CVE.ORG link : CVE-2025-34328

JSON object : View

Products Affected

audiocodes

fax_server
interactive_voice_response

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

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