Case Study: a major UK mobile network operator strengthens 5G security with Fox-IT

Major UK Mobile Network Operator reduces 5G core risk with Fox-IT

A major UK mobile network operator faced significant security challenges while expanding its 5G standalone network. The shift to a software-defined, cloud-native architecture with OpenRAN components created a broader and more complex attack surface, introducing new risks across cloud platforms, APIs, and multi-vendor ecosystems. To address this, the operator engaged Fox-IT for a specialist 5G security testing programme.

Fox-IT delivered a comprehensive security assessment covering the 5G core, Kubernetes containers, virtualised infrastructure, and OpenRAN ecosystems. The solution focused on hardening platforms, reducing API exposure, and improving identity controls between network functions. As a result, the operator gained end-to-end risk visibility and significantly reduced the likelihood of a systemic compromise that could lead to nationwide service disruption or critical infrastructure impact. Fox-IT's work strengthened the resilience of the operator's next-generation infrastructure and helped maintain trust with its enterprise and public-sector customers.