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Private 5G campus networks promise to revolutionise the industrial sector by enabling communication services with high reliability, extremely low latency, high capacity, lower complexity, longer battery-life devices, and high user density according to the well-known use cases URLLC, mMTC, and eMBB. Their installation in complex and mixed environment presents a range of security issues, which have a direct impact on their smooth operation. This work aims to provide a concise overview of the current state of securing 5G campus networks. It discusses the unique security requirements of these networks compared to conventional 5G networks, emphasizing the differences. Additionally, this work outlines specific attacks targeting campus networks and examines the associated security challenges.