A cyber attack on a Polish heat-and-power plant last year exploited a private Access Point Name (APN) to gain access to the facility's Operational Technology (OT) network. The breach, which was not publicly disclosed until now, targeted a plant that provides heat to approximately 50,000 residents. By leveraging the private APN, attackers were able to infiltrate the system, highlighting the vulnerabilities associated with insecure network configurations. The incident underscores the importance of securing OT networks, particularly in critical infrastructure sectors where disruptions can have significant consequences. This type of attack can be particularly damaging, as it can impact not only the facility's operations but also the daily lives of those relying on its services1. The breach matters to security practitioners because it demonstrates the need for robust security measures to protect critical infrastructure from targeted cyber threats.