As businesses grow, the significance of protecting organizational data augments considerably. Work systems in today’s cloud-based environment mean to operate on multiple platforms, multiple locations; which seems perfectly normal and profitable as employees may be separated by time gaps, distances as well as devices; so this flexibility helps them to be functional always even when they are mobile. Cloud computing systems continue to change the ways in which companies use, store, as well as share data, information, applications, & workloads. This has also given rise to a number of new major security threats as well as many other security challenges. With a lot of data and information moving into these cloud systems as well as into the public cloud-based services too particularly, such resources naturally become soft targets for the nasty intruders; thus compromising enterprise security. The volumes of public cloud utilizations are increasing greatly, so that is inevitably leading to much greater sensitive data accumulation, which is in the potential high-risk zone. In comparison to what many people may think, the major responsibility to protect organizational data over cloud networks does not rest with the service providers but with the customers availing those services. We are almost in a period of cloud transition where the main focus has been shifted from the cloud providers to customers. Firms are now gradually learning that massive amount of time spent on figuring out the security provided by any particular cloud provider is virtually having no paybacks. So here are the 5 major security threats that organizations face while using different cloud-based services.