CVE-2025-47188 is a command injection vulnerability affecting Mitel 6800 Series, 6900 Series, 6900w Series SIP Phones, and the 6970 Conference Unit. The flaw exists due to insufficient sanitization of input parameters, allowing an unauthenticated attacker to inject and execute arbitrary commands within the context of the affected devices' operating environment. This vulnerability impacts devices running firmware versions up to 6.4 SP4 (R6.4.0.4006) for the SIP phones and version V1 R0.1.0 for the 6970 Conference Unit. Exploitation does not require user interaction or authentication, making it remotely exploitable over the network. Successful exploitation could lead to unauthorized disclosure or modification of sensitive configuration data, potentially compromising device integrity and confidentiality. While availability impact is not explicitly indicated, command injection could indirectly affect device operation or stability. The vulnerability is classified under CWE-77 (Improper Neutralization of Special Elements used in a Command ('Command Injection')). The CVSS v3.1 base score is 6.5 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and limited confidentiality and integrity impact without availability impact. No known exploits in the wild have been reported as of the publication date (August 7, 2025). No patches or mitigations are currently linked in the provided data, indicating that organizations should prioritize monitoring and mitigation planning.

For European organizations, this vulnerability poses a significant risk to enterprise telephony infrastructure, particularly in sectors relying heavily on Mitel SIP phones and conference units for communication, such as government, finance, healthcare, and large enterprises. Exploitation could lead to unauthorized access to sensitive configuration data, potentially exposing internal network details or enabling further lateral movement. Modification of device configurations could disrupt telephony services, impacting business continuity and operational efficiency. Given that these devices are often integrated into critical communication systems, any compromise could degrade trust in communication channels or facilitate espionage. The lack of authentication requirement and remote exploitability increases the threat surface, especially for organizations with exposed or poorly segmented voice networks. Although no availability impact is directly indicated, command injection could be leveraged to cause device instability or denial of service, further affecting operational capabilities.

1. Immediate network segmentation: Isolate Mitel SIP phones and conference units on dedicated VLANs with strict access controls to limit exposure to untrusted networks. 2. Implement strict firewall rules to restrict inbound and outbound traffic to and from these devices, allowing only trusted management and signaling sources. 3. Monitor network traffic for anomalous command injection patterns or unusual device behavior using IDS/IPS solutions tuned for VoIP environments. 4. Disable any unnecessary services or interfaces on the affected devices to reduce the attack surface. 5. Regularly audit device configurations and logs for signs of unauthorized changes or access attempts. 6. Engage with Mitel support or authorized vendors to obtain firmware updates or patches as soon as they become available. 7. Consider temporary mitigation by applying input validation proxies or network-level filtering to sanitize commands directed at these devices if feasible. 8. Educate IT and security teams about this vulnerability to ensure rapid detection and response in case of exploitation attempts.