CVE-2025-54496 is a heap-based buffer overflow vulnerability classified under CWE-122, affecting Fuji Electric's Monitouch V-SFT-6 software, specifically version 6.2.7.0. The flaw occurs when the software processes a maliciously crafted project file, which can overflow a heap buffer, corrupting memory and enabling arbitrary code execution. The vulnerability requires local access to the system (Attack Vector: Local) and user interaction (UI:R), but no privileges or authentication are necessary, making it accessible to any user with local access who can trick a user into opening a crafted project file. The vulnerability impacts the confidentiality, integrity, and availability of the system, as arbitrary code execution could lead to full system compromise or disruption of industrial control processes. Monitouch V-SFT-6 is an HMI (Human-Machine Interface) software used in industrial automation, meaning exploitation could disrupt critical infrastructure operations. Although no public exploits are known yet, the high CVSS score of 7.8 indicates a serious threat. The vulnerability was reserved in July 2025 and published in November 2025. No patches or fixes are currently linked, suggesting organizations must rely on mitigations until a vendor patch is available. The vulnerability's local attack vector and requirement for user interaction imply that social engineering or insider threats could be attack vectors. The software's role in industrial environments makes this vulnerability particularly dangerous for operational technology (OT) environments.

For European organizations, especially those in manufacturing, energy, and critical infrastructure sectors relying on Fuji Electric Monitouch V-SFT-6, this vulnerability poses a significant risk. Successful exploitation could lead to arbitrary code execution, allowing attackers to manipulate industrial processes, cause operational downtime, or sabotage safety systems. This could result in financial losses, safety hazards, and regulatory non-compliance. The high impact on confidentiality, integrity, and availability means sensitive operational data could be exposed or altered, and systems could be rendered inoperable. Given the local access requirement, insider threats or compromised local machines are primary concerns. The lack of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits rapidly once the vulnerability is public. European industrial sectors are increasingly targeted by cyberattacks, making timely mitigation critical to prevent potential cascading effects on supply chains and public safety.

1. Restrict local access to systems running Monitouch V-SFT-6 to trusted personnel only, employing strict access controls and monitoring. 2. Implement application whitelisting and endpoint protection to detect and block execution of unauthorized or suspicious project files. 3. Educate users about the risks of opening untrusted project files and enforce policies to verify file sources before opening. 4. Use network segmentation to isolate industrial control systems from general IT networks, limiting exposure to potentially malicious files. 5. Monitor logs and system behavior for anomalies indicative of exploitation attempts, such as unexpected process launches or memory corruption symptoms. 6. Engage with Fuji Electric for updates or patches and plan for rapid deployment once available. 7. Employ file integrity monitoring on project files and related configuration data to detect unauthorized changes. 8. Consider deploying host-based intrusion detection systems tailored for industrial control environments to identify exploitation attempts early.