# CVE-2025-34329: AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an unauthenticated…

Source: https://junglewise.ai/threats/cve-2025-34329-audiocodes-fax-server-and-auto-attendant-ivr-appliances-versions  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-19  
License: CC BY 4.0 with a link back

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.

Technologies: [Audiocodes Fax Server](https://junglewise.ai/threats/technologies/fax-server), [Audiocodes Interactive Voice Response](https://junglewise.ai/threats/technologies/interactive-voice-response). Vendors: [Audiocodes](https://junglewise.ai/threats/vendors/audiocodes).

## Quick answers

**Is CVE-2025-34329 exploited in the wild?** 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.

## Affected products

- Audiocodes Fax Server
- Audiocodes Interactive Voice Response

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