The vulnerability CVE-2025-4008 affects the Smartbedded Meteobridge device, a weather station data collection and control system managed via a web interface. The flaw is a command injection vulnerability located in the /cgi-bin/template.cgi script, which is implemented using CGI shell scripts and C. This script improperly uses eval calls on user-supplied input, allowing attackers to inject and execute arbitrary shell commands. Notably, the CGI script is publicly accessible without requiring authentication, enabling unauthenticated remote attackers to exploit the vulnerability simply by sending specially crafted HTTP GET requests. This can be done remotely, including via malicious webpages that embed crafted URLs, facilitating drive-by exploitation without user interaction. Successful exploitation grants attackers root-level command execution on the affected device, potentially allowing full system compromise, data theft, manipulation of weather data, or pivoting to other network assets. The vulnerability was responsibly disclosed by ONEKEY in early 2025 and patched in Meteobridge version 6.2 released on May 13, 2025. Despite the patch availability, CISA has observed active exploitation in the wild, prompting its inclusion in the Known Exploited Vulnerabilities catalog and mandating patch application by U.S. federal agencies by October 23, 2025. The vulnerability has a CVSS score of 8.7, indicating high severity. The attack vector is remote and unauthenticated, with no user interaction required, making it highly dangerous. The Meteobridge device is used globally, including in Europe, primarily in meteorological and IoT contexts. The lack of authentication and the public exposure of the vulnerable CGI script significantly increase the risk profile. The vulnerability shares characteristics with other critical command injection flaws, such as Shellshock, emphasizing the need for urgent remediation.

For European organizations, especially those relying on Meteobridge devices for weather data collection, environmental monitoring, or IoT integration, this vulnerability poses a significant risk. Exploitation can lead to full device compromise, enabling attackers to execute arbitrary commands with root privileges. This can result in unauthorized data access or manipulation, disruption of weather data services, and potential lateral movement within organizational networks. Critical infrastructure sectors such as agriculture, energy, and environmental monitoring, which depend on accurate and reliable weather data, could experience operational disruptions or data integrity issues. Additionally, compromised devices could be leveraged as footholds for broader network intrusions or as part of botnets for further attacks. The ease of exploitation without authentication or user interaction increases the likelihood of widespread attacks. European organizations may face regulatory and compliance repercussions if breaches lead to data loss or service outages. The reputational damage and operational impact could be severe, especially for entities providing public weather services or those integrated into smart city or industrial IoT ecosystems.

1. Immediate deployment of Meteobridge firmware version 6.2 or later, which contains the patch addressing CVE-2025-4008. 2. Isolate Meteobridge devices on segmented network zones with strict access controls to limit exposure to untrusted networks and reduce lateral movement risk. 3. Implement web application firewalls (WAFs) or intrusion prevention systems (IPS) to detect and block malicious HTTP requests targeting /cgi-bin/template.cgi or containing suspicious command injection patterns. 4. Disable or restrict access to the vulnerable CGI scripts if patching is temporarily not possible, including removing public exposure of the /cgi-bin directory. 5. Monitor network traffic and device logs for unusual GET requests or command execution attempts indicative of exploitation. 6. Educate administrators and users about the risks of clicking unsolicited links that could trigger exploitation via malicious webpages. 7. Regularly audit IoT devices and their firmware versions to ensure timely patching and compliance with security policies. 8. Coordinate with vendors and cybersecurity authorities for threat intelligence updates and best practices specific to Meteobridge devices.