Vulnerability in Audiocodes Fax Server
CVE-2025-34333
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audioc… (Product, vendor-advisory, patch, mitigation)
- pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html (Exploit, technical-description, Third Party Advisory, exploit)
- pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt (Exploit, technical-description, Third Party Advisory, exploit)
- www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-world-writable-webroo… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34333?
- CVE-2025-34333 is a high-severity vulnerability in Audiocodes Fax Server, classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2025-11-19.
- How severe is CVE-2025-34333?
- High severity. CVSS v3 base score is 7.8 out of 10.