CVE-2024-22545 is a high-severity remote code execution vulnerability affecting the TRENDnet TEW-824DRU router, specifically version 1.04b01. The vulnerability arises from improper handling of the system.ntp.server parameter within the sub_420AE0() function. An unauthenticated attacker can exploit this flaw by sending crafted input to the vulnerable parameter, enabling arbitrary code execution on the device without requiring any user interaction or prior authentication. The vulnerability is classified under CWE-77, which relates to command injection issues, indicating that the attacker can inject malicious commands that the system executes. The CVSS 3.1 base score of 7.8 reflects the high impact on confidentiality, integrity, and availability, with the vector indicating local attack vector (AV:L), low attack complexity (AC:L), low privileges required (PR:L), no user interaction (UI:N), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Although the attack vector is local, the description states the attack can be launched remotely, which may imply that the vulnerable parameter is accessible via network interfaces, possibly through the router's management interface or exposed services. No patches or known exploits in the wild are currently reported, but the vulnerability poses a significant risk due to the potential for full device compromise, which could lead to network disruption, data interception, or use of the device as a foothold for further attacks.

For European organizations, this vulnerability presents a critical risk, especially for those relying on TRENDnet TEW-824DRU routers in their network infrastructure. Exploitation could lead to complete compromise of the affected routers, enabling attackers to intercept sensitive communications, manipulate network traffic, or disrupt network availability. This is particularly concerning for enterprises, government agencies, and critical infrastructure operators that depend on secure and reliable network connectivity. The ability to execute arbitrary code without authentication increases the attack surface and lowers the barrier for attackers, potentially facilitating lateral movement within networks. Additionally, compromised routers could be leveraged as part of botnets or for launching further attacks against European targets. The lack of available patches increases the urgency for mitigation, and organizations may face regulatory and compliance risks if the vulnerability is exploited to breach data protection laws such as GDPR.

Given the absence of official patches, European organizations should implement immediate compensating controls. First, isolate affected TRENDnet TEW-824DRU devices from untrusted networks, restricting management interfaces to trusted internal networks only. Disable remote management features if enabled, particularly those exposing the system.ntp.server parameter or related services. Employ network segmentation to limit the exposure of vulnerable devices and monitor network traffic for unusual activity indicative of exploitation attempts. Implement strict access controls and use firewall rules to block unauthorized access to router management ports. Regularly audit device configurations and firmware versions to identify vulnerable devices. Where possible, replace affected routers with models from vendors providing timely security updates. Additionally, deploy intrusion detection/prevention systems (IDS/IPS) with signatures targeting command injection attempts on network devices. Maintain heightened monitoring for indicators of compromise and prepare incident response plans to quickly address potential exploitation.