Poland's Internal Security Agency (ABW) has reported that hackers have successfully breached industrial control systems at five water treatment plants across the country. The attackers, believed to be linked to Russian advanced persistent threat (APT) groups, managed to gain access to systems that control vital equipment. This incident is part of a broader campaign that raises concerns about cybersecurity in critical infrastructure. The ability to alter equipment settings poses significant risks not only to the water supply but also to public safety. As these types of cyberattacks become more common, it is crucial for nations to bolster their defenses against potential hybrid warfare tactics.