Ransomware Attack Encrypts IT Systems at Bavarian Municipal Utility

Stadtwerke Landsberg, a German municipal utility providing electricity, water, wastewater and district heating, had its central IT network encrypted in a ransomware attack that began September 1, 2026, The Record (Recorded Future News) reported.

The utility said it isolated its operational technology (OT) systems from the compromised IT network to keep essential services running, and warned that customer personal data — including names, addresses and bank details — may have been accessed. As of the report, no ransomware group had claimed responsibility.

Why it matters: The incident is a textbook example of the IT/OT segmentation strategy that critical-infrastructure operators are increasingly relying on: rather than preventing every IT compromise, the goal becomes containing it before it reaches the operational systems that actually control power, water and heat delivery.

Source: The Record (Recorded Future News), September 8, 2026.