IoT (Internet of Things) is a system where objects are embedded with sensor technology to interact with each other over a wireless communication medium to generate, exchange and transfer data without human interaction. Now Internet of Things(IoT) is getting so much popular than any other trending topic. Up to our best knowledge, it is the first study about vulnerabilities in the application of the Internet of Things. IoT is also getting industrialized using sensors in a simple work also for sake of ease of working and computation but no one thinks about its vulnerabilities and drawback which can affect in future and may result in a leak of private details breaking privacy of the whole world. In this paper, we will talk about all these vulnerabilities and drawbacks of the Internet of Things with a lot of examples