With the prevalence of technology, there is a growing demand for telecommunications, which has led to a scarcity of spectrum. In order to allocate the usage of the spectrum more rationally, many countries have started to use spectrum auctions that can maximize the utilization of limited spectrum resources. However, some potential risks, such as insecurity, might be caused during the process of auctioning the spectrum. This article analyzes the spectrum auctions based on a series of case studies, obtaining the advantages and disadvantages of the discussion. Besides, there is a need for more research to be carried out to investigate the fraudulent conduct of some auctioneers and the manipulative actions of bidders.