CVE-2025-54526 identifies a stack-based buffer overflow vulnerability (CWE-121) in Fuji Electric's Monitouch V-SFT-6, specifically version 6.2.7.0. This vulnerability arises during the processing of specially crafted project files, which can cause the software to overwrite memory on the stack, leading to arbitrary code execution. The flaw requires an attacker to deliver a malicious project file to a user who must then open or process it, implying user interaction is necessary. The CVSS 3.1 base score of 7.8 reflects a high severity, with an attack vector classified as local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), and user interaction required (UI:R). The impact on confidentiality, integrity, and availability is high, as successful exploitation could allow an attacker to run arbitrary code within the context of the vulnerable application, potentially leading to control system compromise. No public exploits are currently known, but the vulnerability is significant given the critical role of Monitouch V-SFT-6 in industrial control environments. The lack of available patches at the time of publication necessitates immediate risk mitigation through operational controls. The vulnerability is particularly concerning for industrial control systems (ICS) and supervisory control and data acquisition (SCADA) environments where Monitouch HMIs are deployed, as exploitation could disrupt manufacturing processes or critical infrastructure operations.

The vulnerability poses a serious risk to European organizations operating industrial control systems that utilize Fuji Electric Monitouch V-SFT-6. Successful exploitation could lead to arbitrary code execution, enabling attackers to manipulate or disrupt industrial processes, potentially causing physical damage, production downtime, or safety incidents. Confidentiality breaches could expose sensitive operational data, while integrity violations might alter control commands, leading to unsafe states. Availability impacts could result in system outages affecting manufacturing lines or critical infrastructure services. Given the local attack vector and requirement for user interaction, the threat is more likely to arise from insider threats or targeted spear-phishing campaigns delivering malicious project files. The high severity score underscores the need for urgent attention, especially in sectors such as manufacturing, energy, and utilities prevalent in Europe. Disruption in these sectors could have cascading economic and safety consequences.

To mitigate this vulnerability, European organizations should: 1) Immediately restrict the import and use of project files from untrusted or unknown sources to prevent malicious file delivery. 2) Implement strict network segmentation to isolate HMI systems from general IT networks and limit exposure. 3) Enforce user training and awareness programs to reduce the risk of opening malicious project files. 4) Monitor and log HMI system activities to detect anomalous behavior indicative of exploitation attempts. 5) Apply vendor patches or updates as soon as they become available; maintain close communication with Fuji Electric for security advisories. 6) Employ application whitelisting and endpoint protection solutions on systems running Monitouch V-SFT-6 to prevent unauthorized code execution. 7) Conduct regular vulnerability assessments and penetration testing focused on industrial control environments to identify and remediate weaknesses proactively.