Weekly review of the National Cyber Security Centre Finland (NCSC-FI) – 43/2025

This week, we highlight why the router is the most important protecting wall in home networks and how it prevents attacks towards home IT equipment. We also cover the data breach towards the F5 technology company and material for cyber security in water supply service published by the VESKY 2025 project. In addition, we talk about Europol’s SIMcartel operation where infrastructure used in frauds was shut down. In the malware review, we take a look at the Expiro virus infecting Windows systems.