CVE-2025-34333

EUVD-2025-198194

19.11.2025, 17:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 10%

Affected Products (NVD)

Vendor	Product	Version
audiocodes	fax_server	𝑥 ≤ 2.6.23
audiocodes	interactive_voice_response	𝑥 ≤ 2.6.23

𝑥

= Vulnerable software versions

Known Exploits!

Common Weakness Enumeration

CWE-276 - Incorrect Default Permissions
During installation, installed file permissions are set to allow anyone to modify those files.

References

https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt

https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html

https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audiocodes-auto-attendant-ivr-solution.pdf

https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-world-writable-webroot-lpe