# CVE-2025-34328: AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Upload RCE via ajaxScript.php

> Unauthenticated attackers can upload arbitrary files to the AudioCodes Fax/IVR Appliance web directory, leading to remote code execution with SYSTEM privileges.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Nov 2025
- **Updated:** 20 Nov 2025
- **Also known as:** GHSA-8fgf-qm9f-cm9j

## What is CVE-2025-34328?

CVE-2025-34328 is a critical vulnerability in AudioCodes Fax/IVR Appliance, published on 19 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2025-34328?

It affects 2 products.


Products: Audiocodes Fax Server, Audiocodes Interactive Voice Response.

## How do I fix CVE-2025-34328?

No fix has been published for CVE-2025-34328 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34328 being exploited?

There is no known exploitation of CVE-2025-34328 in the wild and no public exploit code.

## Other vulnerabilities in AudioCodes Fax/IVR Appliance

- [CVE-2025-34329](https://insights.sbomify.com/CVE-2025-34329/): AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated Backup Upload RCE via ajaxBackupUploadFile.php (critical 9.3)
- [CVE-2025-34331](https://insights.sbomify.com/CVE-2025-34331/): AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Read via download.php (high 8.7)
- [CVE-2025-34334](https://insights.sbomify.com/CVE-2025-34334/): AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via TestFax.php & LPE (high 8.7)
- [CVE-2025-34335](https://insights.sbomify.com/CVE-2025-34335/): AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via ActivateLicense.php (high 8.7)
- [CVE-2025-34332](https://insights.sbomify.com/CVE-2025-34332/): AudioCodes Fax/IVR Appliance <= 2.6.23 Insecure Service Control Scripts LPE (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34328 and fix it if it is affected.

What it is: CVE-2025-34328 is a critical vulnerability in AudioCodes Fax/IVR Appliance, published on 19 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-34328 in the wild and no public exploit code.

Affected product: AudioCodes Fax/IVR Appliance. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-34328/ (Markdown: https://insights.sbomify.com/CVE-2025-34328/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34328
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34328
- OSV: https://osv.dev/vulnerability/CVE-2025-34328

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34328/
Summaries are generated and may contain mistakes; the official description above is the record.