Human history has passed through important technological stages and continues to do so. One of the most important of these stages is the Industry 4.0 process. With this process, traditional industrial production has left its place to an approach where information systems are at the forefront. Industrial communication systems were completely isolated when they were first produced. In time, the Industry 4.0 process started with their connection to internal networks (intranet) and then to the Internet. With the emergence of cyber-physical systems in this process, these systems have become vulnerable to cyber threats. These weaknesses have made smart systems and Industry 4.0 systems the favorite of attackers. Although these systems make significant contributions to human life such as efficiency, speed and operability, if cyber security vulnerabilities are not properly evaluated, the real potential of Industry 4.0 may never be reached. Therefore, the study focused on the Cyber Security component by considering all the components of Industry 4.0. The study will make a significant contribution to the studies on the cyber security dimension of Industry 4.0.