Pro-Russian cyber attackers successfully manipulated a biomass-fired district heating plant in Ruciane-Nida, Poland. They altered technical parameters of a 1,000 kW boiler, but operators quickly detected and reversed the changes. The plant maintained normal operation, and heat delivery to residents remained unaffected throughout the incident.

The attack was reported to CERT Polska and local law enforcement, highlighting a growing pattern of critical infrastructure targeting in Eastern Europe. While no physical damage occurred, the breach demonstrates how industrial control systems remain vulnerable to remote manipulation, even with basic parameter changes.

This event follows years of escalating cyber activity against European energy networks. Security researchers have documented similar probes on utility SCADA systems. The quick operator response prevented disruption, but the incident underscores the need for hardened industrial networks and continuous monitoring of operational technology.