CVE-2024-47258 is a vulnerability classified under CWE-295 (Improper Certificate Validation) affecting 2N Access Commander, a widely used access control management software. Versions 2.1 and prior do not verify TLS certificates of connected 2N edge devices by default, enabling attackers positioned on the network path to perform Man-In-The-Middle (MITM) attacks. Such an attacker could intercept, modify, or replay communications between the Access Commander and edge devices, potentially leading to unauthorized access control commands or data leakage. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity, with an attack vector over the network (AV:A), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The impact affects confidentiality and integrity but not availability. Since February 2022, version 2.2 introduced the option to enforce TLS certificate validation, and version 3.3 added certificate fingerprint verification to strengthen security. No known exploits are reported in the wild yet, but the vulnerability presents a significant risk given the critical nature of access control systems. Organizations relying on vulnerable versions should promptly upgrade and configure certificate validation to prevent exploitation.

For European organizations, this vulnerability poses a significant risk to physical security infrastructure managed by 2N Access Commander. Successful exploitation can lead to unauthorized access to secure facilities by intercepting or manipulating access control commands. Confidentiality of access logs and credentials may be compromised, undermining trust in security operations. Given the widespread use of 2N products in Europe, especially in sectors like government, finance, healthcare, and critical infrastructure, the impact could be severe. Attackers could gain persistent unauthorized entry or disrupt security monitoring without triggering alarms. The lack of required privileges and user interaction lowers the barrier for attackers, increasing the likelihood of exploitation in environments where network segmentation or encryption is insufficient. This could lead to regulatory compliance issues under GDPR and other data protection laws due to potential exposure of personal data or security breaches.

Organizations should immediately upgrade 2N Access Commander to version 3.3 or later to benefit from enhanced certificate fingerprint verification. If upgrading is not immediately feasible, at minimum, enforce TLS certificate validation as introduced in version 2.2 to prevent MITM attacks. Network administrators should ensure that all communications between Access Commander and edge devices occur over secure, segmented networks with strict access controls. Implement network monitoring to detect anomalous traffic patterns indicative of MITM attempts. Regularly audit and verify the authenticity of certificates used by 2N devices and maintain an updated inventory of all edge devices connected to the system. Additionally, consider deploying network-level protections such as TLS interception detection tools and anomaly-based intrusion detection systems. Training security personnel on this specific vulnerability and its exploitation methods will improve incident response readiness.