Cloud computing has become a pivotal and widely embraced technology due to its accessibility and cost-effectiveness. This review explores the intersection of cloud computing and Internet-of-Things (IoT) devices, highlighting the remarkable advancements made in resource utilization and storage methods. However, this rapid growth has also raised concerns about security. Through an in-depth analysis of recent research, we examine the security challenges associated with IoT-based cloud computing, including account hacking, phishing, malware, middleman attacks, and service denial. We also discuss the potential benefits, architectural integration options, and the impact of IoT on cloud computing. This review paper categorizes findings and solutions from recent research papers, ultimately shedding light on the vulnerabilities and weaknesses of IoT-based cloud computing, along with its performance and stability issues.