A recent cyber attack on a Polish power plant compromised its private cellular network, allowing hackers to shut down a steam turbine and the process-water treatment system. The plant, which provides heat to approximately 50,000 residents, was able to initiate recovery procedures at 7:30 a.m. while the attackers were still active in the network, minimizing the impact on customers. The breach highlights the vulnerability of critical infrastructure to cyber threats, particularly those that rely on private cellular networks to control remote equipment1. The fact that the hackers were able to access and manipulate the plant's systems via this network raises concerns about the security of similar facilities. The incident demonstrates the potential for cyber attacks to have significant real-world consequences, including disruptions to essential services. So what matters to practitioners is that this incident underscores the need for robust security measures to protect critical infrastructure from cyber threats.