CVE-2025-64127 is an OS command injection vulnerability classified under CWE-78 affecting the Zenitel TCIV-3+ intercom system. The root cause is insufficient sanitization of user-supplied input parameters that are incorporated directly into operating system commands without proper validation or escaping. This flaw allows an unauthenticated attacker to remotely execute arbitrary commands on the underlying OS, potentially gaining full control over the device. The vulnerability is rated critical with a CVSS 3.1 base score of 10.0, reflecting its high exploitability (network attack vector, no privileges or user interaction required) and severe impact on confidentiality, integrity, and availability. The vulnerability was published on November 26, 2025, with no known exploits in the wild at the time of reporting. The Zenitel TCIV-3+ is typically deployed in communication and security systems, often within critical infrastructure environments. Without a patch currently available, attackers could leverage this vulnerability to disrupt operations, exfiltrate sensitive data, or pivot into internal networks. The vulnerability's scope is broad due to the network-exposed nature of the device and lack of authentication barriers.

For European organizations, the impact of CVE-2025-64127 is substantial. Zenitel TCIV-3+ devices are commonly used in public safety, transportation, and critical infrastructure sectors, which are highly sensitive to disruptions. Successful exploitation could lead to full device compromise, allowing attackers to intercept or manipulate communications, disrupt security operations, or use the device as a foothold for further network intrusion. This could result in operational downtime, data breaches, and damage to public trust. Given the criticality of these systems, the vulnerability poses a direct threat to national security and public safety. The lack of authentication and ease of exploitation increase the likelihood of attacks, especially from opportunistic or state-sponsored actors targeting European critical infrastructure. The potential for cascading effects on interconnected systems further amplifies the risk.

1. Immediately isolate Zenitel TCIV-3+ devices from untrusted networks and restrict access to trusted management networks only. 2. Implement strict network segmentation and firewall rules to limit exposure of the affected devices. 3. Deploy intrusion detection/prevention systems (IDS/IPS) with signatures or anomaly detection tuned to identify command injection attempts targeting these devices. 4. Conduct thorough input validation and sanitization on any user inputs or interfaces interacting with the device, if customization is possible. 5. Monitor device logs and network traffic for unusual command execution patterns or unauthorized access attempts. 6. Engage with Zenitel for official patches or firmware updates addressing this vulnerability and apply them promptly once available. 7. Develop and test incident response plans specific to potential compromise of communication devices. 8. Consider temporary compensating controls such as disabling unnecessary services or interfaces on the device to reduce attack surface.