ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-34335

AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an authenticated command injection vulnerability in the license activation workfl

Published Nov 19, 2025 · catalog updated Nov 21, 2025 · AudioCodes Limited AudioCodes Fax/IVR Appliance

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-34335. EPSS is 2.82%. Act only if a listed version of AudioCodes Limited AudioCodes Fax/IVR Appliance is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.82%
Remediation
Vendor / distro source
Affected products
vendor AudioCodes Limited AudioCodes Fax/IVR Appliance 0 ≤2.6.23

AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an authenticated command injection vulnerability in the license activation workflow handled by AudioCodes_files/ActivateLicense.php. When a license file is uploaded, the application derives a new filename by combining a generated base name with the attacker-controlled extension portion of the original upload name, then constructs a command line for fax_server_lic_cmdline.exe that includes this path. The extension value is incorporated into the command string without input validation, escaping, or

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor AudioCodes Limited AudioCodes Fax/IVR Appliance 0 ≤2.6.230 ≤2.6.23

How to fix CVE-2025-34335

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-34335. EPSS is 2.82%. Act only if a listed version of AudioCodes Limited AudioCodes Fax/IVR Appliance is installed.

Which versions are affected?

Compare what you have installed with AudioCodes Limited AudioCodes Fax/IVR Appliance 0 ≤2.6.23 0 ≤2.6.23. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 2.82%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 19, 2025 · EUVD

    Detected

    AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an authenticated command injection vulnerability in the license activation workflow handled by AudioCodes_files/ActivateLicense.php. When a license file is uploaded, the application derives a new filename by combining a generated base name with the attacker-controlled extension portion of the origina

  2. Nov 21, 2025 · EUVD

    Updated

    AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an authenticated command injection vulnerability in the license activation workflow handled by AudioCodes_files/ActivateLicense.php. When a license file is uploaded, the application derives a new filename by combining a generated base name with the attacker-controlled extension portion of the origina

Sources

  • CVE.orgVulnerability recordCVE-2025-34335

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-34335

    30-day exploitation probability 2.82%

    first.org
  • EUVDVulnerability recordEUVD-2025-198200

    AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an authenticated command injection vulnerability in the license activation workflow handled by AudioCodes_files/ActivateLicense.php. When a license file is uploaded, the application

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 28, 2026
  • EUVDOct 28, 2026