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CVE-2025-34331— AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Read via download.php

Quick assessment

Affected
AudioCodes Limited AudioCodes Fax/IVR Appliance
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AudioCodes Fax Server是以色列AudioCodes公司的一个传真服务器。 AudioCodes Fax Server 2.6.23及之前版本存在安全漏洞，该漏洞源于未经验证的文件读取机制，可能导致敏感数据泄露。

AI Predicted 8.6 Difficulty: Easy EPSS 0.53% · P43
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I. Basic Information for CVE-2025-34331

Vulnerability Information
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Vulnerability Title
AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Read via download.php
Source: CVE Program / CVE List V5
Vulnerability Description
AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 contain an unauthenticated file read vulnerability via the download.php script. The endpoint exposes a file download mechanism that lacks access control, allowing remote, unauthenticated users to request files stored on the appliance based solely on attacker-supplied path and filename parameters. While limited to specific file extensions permitted by the application logic, sensitive backup archives can be retrieved, exposing internal databases and credential hashes. Successful exploitation may lead to disclosure of administrative password hashes and other sensitive configuration data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
AudioCodes Fax Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AudioCodes Fax Server是以色列AudioCodes公司的一个传真服务器。 AudioCodes Fax Server 2.6.23及之前版本存在安全漏洞，该漏洞源于未经验证的文件读取机制，可能导致敏感数据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AudioCodes Limited AudioCodes Fax/IVR Appliance 0 ~ 2.6.23 -

II. Public POCs for CVE-2025-34331

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III. Intelligence Information for CVE-2025-34331

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Security Blog Posts for CVE-2025-34331 (1)

Same Patch Batch · AudioCodes Limited · 2025-11-19 · 8 CVEs total

CVE-2025-34334 AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via TestFax.php & L
CVE-2025-34335 AudioCodes Fax/IVR Appliance <= 2.6.23 Authenticated Command Injection via ActivateLicense
CVE-2025-34328 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated File Upload RCE via ajaxScript.php
CVE-2025-34332 AudioCodes Fax/IVR Appliance <= 2.6.23 Insecure Service Control Scripts LPE
CVE-2025-34333 AudioCodes Fax/IVR Appliance <= 2.6.23 World-Writable Webroot LPE
CVE-2025-34329 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated Backup Upload RCE via ajaxBackupUpl
CVE-2025-34330 AudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated Prompt File Upload via ajaxPromptUp

IV. Related Vulnerabilities

Same product: AudioCodes Fax/IVR Appliance
Same vendor: AudioCodes Limited
Same weakness: CWE-306

V. Comments for CVE-2025-34331

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