CVE-2024-11796 is an out-of-bounds write vulnerability classified under CWE-787 affecting Fuji Electric Monitouch V-SFT version 6.2.3.0. The flaw exists in the V9C file parsing component where user-supplied data is not properly validated, leading to a write operation beyond the allocated buffer boundaries. This memory corruption can be exploited remotely by an attacker who convinces a user to open a crafted malicious V9C file or visit a malicious web page that triggers the vulnerable parser. The vulnerability enables arbitrary code execution within the context of the Monitouch V-SFT process, potentially allowing attackers to execute malicious payloads, escalate privileges, or disrupt system operations. The CVSS v3.0 score of 7.8 reflects high impact on confidentiality, integrity, and availability, with attack vector local but requiring only low complexity and no privileges, though user interaction is necessary. The vulnerability was reported by ZDI (ZDI-CAN-24506) and is currently published without an available patch. This software is commonly used in industrial control and monitoring environments, making the vulnerability particularly critical for operational technology (OT) security.

The vulnerability can lead to remote code execution, allowing attackers to take control of the affected Monitouch V-SFT process. This can compromise sensitive industrial control data, disrupt monitoring and control operations, and potentially cause physical damage or safety hazards in industrial environments. The high severity and full impact on confidentiality, integrity, and availability mean that affected organizations could face operational downtime, data breaches, and loss of control over critical infrastructure. Since the product is used in industrial automation, the impact extends to sectors such as manufacturing, energy, and utilities, where disruption can have cascading effects on supply chains and public safety. The requirement for user interaction limits mass exploitation but targeted attacks against industrial operators remain a significant threat.

Organizations should implement strict controls on file handling, including disabling or restricting the opening of unsolicited V9C files and blocking access to untrusted websites that could host malicious files. Network segmentation should isolate Monitouch V-SFT systems from general IT networks to reduce exposure. Employ application whitelisting and endpoint detection to monitor for anomalous process behavior. Fuji Electric should be engaged to obtain patches or mitigations as soon as they become available. Until patches are released, consider deploying virtual patching via intrusion prevention systems that detect malformed V9C files. User training to recognize phishing and malicious file risks is critical. Regular backups and incident response plans tailored to OT environments will help mitigate potential damage from exploitation.