CVE-2024-11793 is a remote code execution vulnerability identified in Fuji Electric Monitouch V-SFT version 6.2.3.0, a human-machine interface (HMI) software used in industrial automation. The flaw is an out-of-bounds write (CWE-787) occurring during the parsing of V9C files, which are likely configuration or project files used by the software. The vulnerability stems from insufficient validation of user-supplied data, allowing an attacker to write beyond the allocated buffer boundaries. This memory corruption can be exploited to execute arbitrary code within the context of the Monitouch V-SFT process. Exploitation requires user interaction, such as opening a maliciously crafted V9C file or visiting a malicious web page that triggers the vulnerable parsing routine. The CVSS v3.0 score of 7.8 reflects high severity, with attack vector local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), and user interaction required (UI:R). The impact includes full compromise of confidentiality, integrity, and availability of the affected system. No patches or exploits are currently publicly available, but the vulnerability has been disclosed by the Zero Day Initiative (ZDI) as ZDI-CAN-24503. Given the critical role of HMI software in industrial environments, exploitation could lead to unauthorized control, data theft, or disruption of industrial processes.

The vulnerability poses significant risks to organizations using Fuji Electric Monitouch V-SFT in industrial control systems, manufacturing plants, and critical infrastructure. Successful exploitation can lead to remote code execution, allowing attackers to gain control over the HMI software and potentially the underlying industrial processes it manages. This could result in unauthorized manipulation of operational parameters, data theft, sabotage, or denial of service, impacting production continuity and safety. The requirement for user interaction limits mass exploitation but targeted attacks against industrial operators remain a serious concern. The high confidentiality, integrity, and availability impact means that sensitive operational data could be exposed or altered, and system availability could be compromised, leading to financial losses, safety hazards, and reputational damage. The lack of known exploits currently provides a window for proactive mitigation before widespread attacks emerge.

Organizations should immediately review and restrict access to Fuji Electric Monitouch V-SFT version 6.2.3.0 installations and avoid opening untrusted V9C files or visiting unverified web pages that could trigger the vulnerability. Network segmentation should isolate HMI systems from general IT networks and the internet to reduce exposure. Employ application whitelisting and endpoint protection to detect and block suspicious activities related to file parsing. Monitor logs for unusual behavior indicative of exploitation attempts. Fuji Electric should be contacted for official patches or updates; if unavailable, consider temporary compensating controls such as disabling file import features or restricting user permissions to limit the impact of potential exploitation. User training on phishing and social engineering risks is critical to reduce the likelihood of user interaction-based attacks. Regular vulnerability scanning and penetration testing focused on industrial control systems can help identify and remediate exposure.