CVE-2025-34334CWE-78command-injection

CVE-2025-34334

High · published November 19, 2025

CVSS v3.1
8.8
EPSS
3%
Percentile
88.9
In the wild
Unconfirmed
What it is

🔥 An authenticated command injection vulnerability sneaks into AudioCodes Fax Server and Auto-Attendant IVR appliances, allowing attackers to execute commands with SYSTEM privileges! ⚡ Think of it like an overly trusting chef who accepts any ingredient for their special recipe without checking — a bad egg could ruin the entire dish! In this case, the application builds a command line from unverified inputs, which is a recipe for disaster. An attacker with access to the fax test interface could inject malicious commands, effectively taking over the system with full privileges! This could lead to unauthorized access to sensitive data or complete compromise of the server — a nightmare scenario for any organization.

Put simply

Think of it like an overly trusting chef who accepts any ingredient for their special recipe without checking — a bad egg could ruin the entire dish! In this case, the application builds a command line from unverified inputs, which is a recipe for disaster. This vulnerability arises from improper validation of parameters in the fax test functionality located in TestFax.php. An attacker can leverage this flaw to craft a command injection, allowing arbitrary command execution as an NT AUTHORITY\SYSTEM user.

What to do

An attacker with access to the fax test interface could inject malicious commands, effectively taking over the system with full privileges! This could lead to unauthorized access to sensitive data or complete compromise of the server — a nightmare scenario for any organization. Immediately patch to version 2.6.24 or higher to eliminate this vulnerability. Additionally, review file system permissions to ensure that only authorized users can modify batch files in the temporary run directory. Regularly audit your systems for unauthorized access. You've got this! With these steps, you'll fortify your systems and keep potential threats at bay! 🛡️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.03436 · 88.9th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2025-11-19T22:15Z
Affected products (2)
ProductVersionsFixed in
audiocodes/fax_server≤ 2.6.23—
audiocodes/interactive_voice_response≤ 2.6.23—
References (4)
EPSS history
Timeline
  • 19 NOV 16:23Z
    AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via TestFax.php & LPE
    cvelistv5