5G networks are being actively implemented in many countries around the world. The goal of introducing technologies that make up the new standard is to reduce information transmission delays, increase transmission speed, and increase the number of devices served. To achieve the targets, 5G networks must be built using software-defined networking (SDN) and network function virtualization (NFV) technology. This paper analyzes the integrity, resilience and security of 5G networks based on SDN/NFV, as well as provides recommendations for the comprehensive information security of such networks.