CVE-2025-34329: AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an unauthenticated…
CVE-2025-34329 · Severity: critical · CVSS 9.8 · Published 2025-11-19
AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an unauthenticated backup upload endpoint at AudioCodes_files/ajaxBackupUploadFile.php in the F2MAdmin web interface. The script derives a backup folder path from application configuration, creates the directory if it does not exist, and then moves an uploaded file to that location using the attacker-controlled filename, without any authentication, authorization, or file-type validation. On default Windows deployments where the backup directory resolves to the system drive, a remote attacker can upload web server or interpreter configuration files that cause a log file or other server-controlled resource to be treated as executable code. This allows subsequent HTTP requests to trigger arbitrary command execution under the web server account, which runs as NT AUTHORITY\\SYSTEM.
No. Junglewise Threat Intelligence has no report of CVE-2025-34329 being exploited in the wild.
How severe is CVE-2025-34329?
Critical severity, with a CVSS score of 9.8, published 19 November 2025.
Which products and versions are affected?
Audiocodes Fax Server, Audiocodes Interactive Voice Response. The advisory does not name versions.
Is there a fix for CVE-2025-34329?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-34329?
Check whether you run Audiocodes Fax Server or Audiocodes Interactive Voice Response. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.