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CVE-2025-34328

CRITICAL

9.8

Description

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published11/19/2025

Last Modified12/12/2025

Sourcenvd

Honeypot Sightings0

Affected Products

audiocodes:fax_serveraudiocodes:interactive_voice_response

Weaknesses (CWE)

CWE-434

References

https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt(disclosure@vulncheck.com)

https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html(disclosure@vulncheck.com)

https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audiocodes-auto-attendant-ivr-solution.pdf(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-unauthenticated-file-upload-rce-via-ajaxscript(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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