CVE-2026-104811: Mitel MiVoice Office 400 Music on Hold WAV File Upload Code Execution
DigitalCanion SA has discovered a vulnerability that allows remote attackers to execute arbitrary code on affected installations of the product. Authentication may be required to exploit this vulnerability.
The specific flaw exists within the Configuration → Services → Music on Hold functionality of the web portal listening on TCP port 443. The application is intended to allow users to upload WAV audio files but fails to properly validate the uploaded file type. An attacker can exploit this behavior to upload a malicious shared object (.so) instead of a WAV file. When the uploaded file is subsequently processed by the affected component, attacker-controlled code is loaded and executed in the context of the affected process. This can result in remote code execution and potentially full compromise of the underlying Linux system.
Affected Software
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The vulnerable functionality is exposed through the web portal on TCP port 443. Authentication may be required, so attackers may need valid portal access depending on the installation.
What must occur after the malicious upload for code execution to happen?
An attacker uploads a malicious shared object file disguised in place of a WAV file through Configuration → Services → Music on Hold. Code executes when the affected component subsequently processes the uploaded file and loads it.
What is the potential impact of successful exploitation?
The attacker can execute arbitrary code in the context of the affected process. This may lead to full compromise of the underlying Linux system.