This report provides a comprehensive overview of security threats in cloud computing and explores various preventive methods. It begins with an introduction to cloud computing, its relevant technologies such as IoT and Big Data, and their applications. The report then identifies and discusses the challenges faced in cloud computing, including security vulnerabilities, cost considerations, and compliance issues. A significant portion of the report is dedicated to identifying research gaps, highlighting areas where current literature is lacking, particularly in areas like data security and the integration of emerging technologies. The report also examines the impact of security threats, such as malware and cyberattacks, and emphasizes the importance of cybersecurity and security management programs. Finally, it summarizes the findings, emphasizing the need for robust security measures to ensure data privacy and system integrity, ultimately paving the way for future research and development in cloud security.