CVE-2025-34328
criticalAudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web administration component (F2MAdmin) that exposes an u…
Vendor / product: Audiocodes — fax server
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
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-audiocode... disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-unauthenticated-file-upl... disclosure@vulncheck.com