# CVE-2025-34331: AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Read via download.php

> Unauthenticated attackers can read sensitive files, including credential hashes, from AudioCodes Fax/IVR appliances via the download.php endpoint.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/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-cm6j-j6mx-7fjj

## What is CVE-2025-34331?

CVE-2025-34331 is a high-severity missing authorization 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 contain an unauthenticated file read vulnerability via the download.php script. The endpoint exposes a file download mechanism that lacks access control, allowing remote, unauthenticated users to request files stored on the appliance based solely on attacker-supplied path and filename parameters. While limited to specific file extensions permitted by the application logic, sensitive backup archives can be retrieved, exposing internal databases and credential hashes. Successful exploitation may lead to disclosure of administrative password hashes and other sensitive configuration data.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2025-34331?

It affects 2 products.


Products: Audiocodes Fax Server, Audiocodes Interactive Voice Response.

## How do I fix CVE-2025-34331?

No fix has been published for CVE-2025-34331 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34331 being exploited?

There is no known exploitation of CVE-2025-34331 in the wild and no public exploit code.

## Other vulnerabilities in AudioCodes Fax/IVR Appliance

- [CVE-2025-34328](https://insights.sbomify.com/CVE-2025-34328/): AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Upload RCE via ajaxScript.php (critical 9.3)
- [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-2025-34334](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-2025-34331 and fix it if it is affected.

What it is: CVE-2025-34331 is a high-severity missing authorization 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-2025-34331 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-2025-34331/ (Markdown: https://insights.sbomify.com/CVE-2025-34331/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34331
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34331
- OSV: https://osv.dev/vulnerability/CVE-2025-34331

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34331/
Summaries are generated and may contain mistakes; the official description above is the record.