Cloud computing has significant advantages in terms of scalability, cost-effectiveness, and accessibility, transforming several industries such as education, healthcare, banking, and agriculture. Nevertheless, the inherent hazards linked to data security and privacy in cloud systems present notable obstacles. This paper focuses on a variety of security concerns, including distributed denial-of-service (DDoS) attacks, insider threats, malware, data breaches, phishing, and unsafe API calls. It emphasizes the significance of taking proactive steps to reduce these risks. Examinations of instances where data breaches have occurred highlight the tangible outcomes of insufficient security measures, emphasizing the necessity for strong security policies. In addition, the article explores several security solutions such as encryption, periodic password changes, data backups, and monitoring tools like AWS CloudWatch/CloudTrail to strengthen data security in cloud environments. This document outlines the mutual obligations of cloud service providers and consumers in relation to Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS) models. It specifically addresses concerns regarding unauthorized access, data loss, corruption, and compliance matters. Furthermore, the study examines problems regarding the privacy of data, including techniques such as data masking, encryption, segregation, portability, and interoperability. It emphasizes the importance of staff training and awareness programmes in promoting a culture of data protection. To summarize, although cloud computing presents exceptional prospects for innovation and productivity, it is crucial to prioritize the resolution of data security and privacy issues to establish trust and fully exploit the capabilities of cloud technology.