G7 tests joint response to major financial cyberattack

Financial authorities across the G7 have completed a joint exercise simulating a large cyberattack spanning all seven jurisdictions.

An incident affecting banks or markets can cross borders quickly, while fragmented communication may delay recovery and deepen disruption. The 2026 Cross-Border Coordination Exercise brought together finance ministries, central banks, bank supervisors and market authorities to practise a unified response.

Participants tested improvements identified after an earlier 2024 exercise and subsequent workshops. The simulation focused on incident response, recovery and crisis communication, helping authorities align the operational and strategic parts of managing a cross-border emergency.

The G7 Cyber Expert Group has now adopted a long-term strategy intended to make these exercises more frequent and consistent. That turns preparedness into an ongoing process rather than a one-off event.

This matters to ordinary people because financial cyber incidents can affect payments, savings and access to essential services. Still, the announcement provides no independent scoring or detailed evidence of how well participants performed. Exercises reduce risk only when lessons are translated into concrete system changes, tested again and shared appropriately with the institutions expected to act.