CVE-2025-34333
HIGHAudioCodes Fax Server/IVR <=2.6.23 Privilege Escalation via Webroot Permissions
Title source: llmDescription
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.
References (4)
Core 4
Core References
Product vendor-advisory
patch
mitigation
https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audiocodes-auto-attendant-ivr-solution.pdf
Exploit, Third Party Advisory technical-description
exploit
https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html
Exploit, Third Party Advisory technical-description
exploit
https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-world-writable-webroot-lpe
Scores
CVSS v3
7.8
EPSS
0.0017
EPSS Percentile
6.7%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-276
Status
published
Products (2)
audiocodes/fax_server
< 2.6.23
audiocodes/interactive_voice_response
< 2.6.23
Published
Nov 19, 2025
Tracked Since
Feb 18, 2026