CVE-2025-64156 is a SQL injection vulnerability identified in Fortinet FortiVoice, a widely used VoIP telephony system. The flaw exists due to improper neutralization of special elements in SQL commands, allowing an attacker with privileged authenticated access to inject malicious SQL code via crafted requests. This can lead to unauthorized execution of code or commands on the affected system. The vulnerability affects multiple FortiVoice versions: all versions of 6.0 and 6.4, versions 7.0.0 through 7.0.7, and versions 7.2.0 through 7.2.1. The CVSS v3.1 base score is 6.8, indicating a medium severity level. The vector metrics specify network attack vector (AV:N), low attack complexity (AC:L), high privileges required (PR:H), no user interaction (UI:N), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). The exploitability is partially functional (E:P), with no remediation level or report confidence changes. No public exploits are currently known. The vulnerability could allow attackers to compromise the telephony system, potentially intercepting calls, altering configurations, or disrupting service. FortiVoice is often deployed in enterprise and service provider environments, making this vulnerability significant for organizations relying on Fortinet's telephony solutions. The attack requires privileged credentials, limiting exposure to insiders or attackers who have already compromised administrative accounts. However, once exploited, the impact on system confidentiality, integrity, and availability is severe. The lack of available patches at the time of publication necessitates immediate risk mitigation through access controls and monitoring.

For European organizations, this vulnerability poses a significant risk to telephony infrastructure security. Successful exploitation could lead to unauthorized access to sensitive communications, disruption of voice services, and potential lateral movement within networks. Confidentiality breaches could expose private conversations or call metadata, while integrity violations might allow attackers to alter call routing or system configurations. Availability impacts could result in denial of telephony services, affecting business operations and emergency communications. Organizations in sectors such as finance, healthcare, government, and critical infrastructure are particularly vulnerable due to their reliance on secure and reliable voice communications. The requirement for privileged authentication reduces the likelihood of remote exploitation by external attackers but raises concerns about insider threats or compromised administrative accounts. The absence of known exploits in the wild currently limits immediate risk but does not preclude future exploitation. European entities must consider the potential for targeted attacks leveraging this vulnerability, especially in high-value or strategic environments.

1. Apply official patches from Fortinet as soon as they become available for all affected FortiVoice versions. 2. Restrict administrative access to FortiVoice management interfaces using network segmentation, VPNs, and IP whitelisting to minimize exposure. 3. Enforce strong authentication mechanisms, including multi-factor authentication (MFA), for all privileged accounts to reduce the risk of credential compromise. 4. Regularly audit and monitor logs for unusual or unauthorized activities, particularly SQL query anomalies or unexpected command executions. 5. Implement network intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics capable of detecting SQL injection attempts targeting FortiVoice. 6. Limit the number of privileged accounts and apply the principle of least privilege to reduce the attack surface. 7. Conduct security awareness training for administrators to recognize phishing or social engineering attempts that could lead to credential theft. 8. Consider deploying application-layer firewalls or web application firewalls (WAFs) that can detect and block SQL injection payloads targeting FortiVoice interfaces. 9. Maintain up-to-date asset inventories to quickly identify and remediate vulnerable FortiVoice deployments. 10. Develop and test incident response plans specific to telephony system compromises to ensure rapid containment and recovery.