Last year, hackers successfully breached a heat-and-power plant in Poland that provides energy to around 50,000 residents. The attackers gained access to the plant's operational technology network by exploiting a private Access Point Name (APN). This incident raises serious concerns about the security of critical infrastructure, as such breaches can disrupt essential services and pose risks to public safety. The attack highlights the vulnerabilities within industrial control systems, which often have insufficient protections against cyber threats. As the energy sector increasingly relies on digital technologies, it is vital for operators to enhance their cybersecurity measures to prevent similar incidents in the future.