AudioCodes Fax Server/Auto-Attendant IVR up to 2.6.23 HTTP Request default permission

Summaryinfo

A vulnerability categorized as critical has been discovered in AudioCodes Fax Server and Auto-Attendant IVR up to 2.6.23. Affected by this vulnerability is an unknown functionality of the component HTTP Request Handler. The manipulation results in default permission. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is known as CVE-2025-34333. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability was found in AudioCodes Fax Server and Auto-Attendant IVR up to 2.6.23. It has been classified as critical. Affected is an unknown functionality of the component HTTP Request Handler. The manipulation with an unknown input leads to a default permission vulnerability. CWE is classifying the issue as CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 configure the web document root at C:\\F2MAdmin\\F2E with overly permissive file system permissions. Authenticated local users have modify rights on this directory, while the associated web server process runs as NT AUTHORITY\\SYSTEM. As a result, any local user can create or alter server-side scripts within the webroot and then trigger them via HTTP requests, causing arbitrary code to execute with SYSTEM privileges.

The weakness was published by Pierre Barre. The advisory is available at audiocodes.com. This vulnerability is traded as CVE-2025-34333 since 04/15/2025. The exploitability is told to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 12/12/2025). This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Router Operating System

Vendor

• AudioCodes

Name

• Auto-Attendant IVR
• Fax Server

Version

• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 2.6.6
• 2.6.7
• 2.6.8
• 2.6.9
• 2.6.10
• 2.6.11
• 2.6.12
• 2.6.13
• 2.6.14
• 2.6.15
• 2.6.16
• 2.6.17
• 2.6.18
• 2.6.19
• 2.6.20
• 2.6.21
• 2.6.22
• 2.6.23

Support

• end of life

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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