CVE-2025-34518 is a path traversal vulnerability classified under CWE-22 found in the Ilevia EVE X1 Server firmware versions up to 4.7.18.0.eden. The vulnerability resides in the get_file_content.php endpoint, which improperly restricts pathname inputs, allowing attackers to traverse directories and access arbitrary files outside the intended directory scope. This flaw can be exploited remotely over the network without any authentication or user interaction, making it highly accessible to attackers. The CVSS 4.0 base score of 8.7 reflects the high impact on confidentiality, as attackers can read sensitive files, potentially including configuration files, credentials, or other sensitive data stored on the device. There is no impact on integrity or availability, and no privileges are required to exploit this vulnerability. Despite its severity, Ilevia has declined to issue a patch and recommends customers avoid exposing port 8080 to the internet, the default port for the vulnerable service. No known exploits are currently reported in the wild, but the ease of exploitation and high impact make this a critical concern for organizations using the affected firmware. The lack of patch availability necessitates reliance on network-level mitigations and strict access controls to prevent exploitation.

For European organizations, this vulnerability poses a significant risk to the confidentiality of sensitive information stored on or accessible through the EVE X1 Server devices. Attackers exploiting this flaw can gain unauthorized access to configuration files, credentials, or other sensitive data, potentially leading to further compromise of internal networks or systems. Organizations in sectors such as critical infrastructure, manufacturing, or government that utilize Ilevia devices may face increased risk of espionage, data leakage, or operational disruption. The inability to patch the vulnerability increases exposure duration and risk. Additionally, if these devices are exposed to the internet or poorly segmented within internal networks, attackers can easily exploit the vulnerability remotely. This could lead to compliance violations under GDPR if personal or sensitive data is exposed. The impact is primarily on confidentiality, but the resulting information disclosure could facilitate subsequent attacks affecting integrity or availability.

Given the vendor's refusal to patch, European organizations must implement robust network-level defenses. First, ensure that port 8080 on EVE X1 Server devices is never exposed to the internet; block inbound traffic to this port at the perimeter firewall. Employ network segmentation to isolate these devices from critical internal networks and sensitive data repositories. Implement strict access control lists (ACLs) to limit access to the management interface only to trusted administrative hosts within secure networks. Deploy intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics to detect suspicious path traversal attempts targeting get_file_content.php. Regularly audit device configurations and logs for unauthorized access attempts. Consider deploying web application firewalls (WAFs) that can filter malicious HTTP requests exploiting path traversal. If possible, replace or upgrade affected devices with alternative solutions from vendors that provide timely security updates. Finally, maintain an incident response plan to quickly address any detected exploitation attempts.