CVE-2025-11787 is an OS command injection vulnerability classified under CWE-78, impacting Circutor's SGE-PLC1000 and SGE-PLC50 devices running firmware version 9.0.2. The vulnerability arises from improper neutralization of special characters in the operating system commands invoked by the 'GetDNS()', 'CheckPing()', and 'TraceRoute()' functions. These functions likely accept user-supplied input to perform network diagnostic operations, but fail to sanitize this input properly, allowing attackers to inject arbitrary OS commands. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L - low privileges), and user interaction needed (UI:A). The vulnerability impacts confidentiality, integrity, and availability at a high level (VC:H, VI:H, VA:H), meaning successful exploitation can lead to full system compromise, data leakage, or denial of service. Although no public exploits are currently known, the ease of exploitation and critical impact make this a significant threat. The lack of available patches at the time of publication necessitates immediate risk mitigation. The affected devices are commonly used in industrial and energy management contexts, where such vulnerabilities can have severe operational consequences.

For European organizations, particularly those in industrial automation, energy management, and critical infrastructure sectors, this vulnerability poses a significant risk. Successful exploitation could allow attackers to execute arbitrary commands on affected devices, leading to unauthorized data access, manipulation of operational parameters, disruption of services, or complete device takeover. This could result in operational downtime, safety hazards, and financial losses. Given the widespread use of Circutor devices in European energy grids and industrial environments, the impact could extend to national critical infrastructure, affecting energy distribution and industrial process stability. The requirement for only low privileges and user interaction lowers the barrier for attackers, increasing the likelihood of exploitation in targeted attacks or insider threat scenarios. The high confidentiality, integrity, and availability impact ratings underscore the potential for severe consequences if the vulnerability is exploited.

1. Monitor Circutor's official channels for firmware updates or patches addressing CVE-2025-11787 and apply them promptly once available. 2. Until patches are released, restrict network access to the management interfaces of SGE-PLC1000 and SGE-PLC50 devices, limiting exposure to trusted networks and personnel only. 3. Implement strict input validation and sanitization on any user inputs that interact with the vulnerable functions, if custom integrations or scripts are used. 4. Employ network segmentation to isolate vulnerable devices from broader enterprise and operational networks, reducing the attack surface. 5. Use intrusion detection and prevention systems (IDS/IPS) to monitor for anomalous command execution patterns or suspicious network traffic targeting these devices. 6. Conduct regular security audits and penetration testing focused on industrial control systems to identify and remediate similar vulnerabilities. 7. Educate staff on the risks of social engineering and the importance of minimizing user interaction that could trigger exploitation. 8. Maintain robust logging and monitoring to detect early signs of exploitation attempts.