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Recently, the use of IoT devices in living environments has increased due to the development of various wireless communication technologies. As the number of types of IoT devices has grown exponentially, many kinds of insecure operating systems and open source software programs are being used. As they run with security vulnerabilities, IoT devices using such OS and software can be targeted by malicious attackers. In addition, due to the operating characteristics of IoT devices, it is difficult to apply security patches immediately when vulnerabilities are found. Accordingly, there is an increasing need for managing and sharing cyber security threat information in order to prevent security threats and accidents. This paper suggests a platform structure and application method for collecting, analyzing and sharing vulnerability information about IoT devices.