G7 Plans Exercises to Defend Against AI Cyberattacks: What Banks Need to Know

Artificial intelligence is changing the cybersecurity landscape. Security teams can use AI to analyse suspicious activity, but criminals can also use the technology to identify weaknesses, automate parts of an attack and create convincing fraudulent communications.

Finance authorities are paying particular attention to the possibility that AI-assisted attacks could disrupt banks or undermine confidence in financial services. On 16 October 2026, the G7 agreed to conduct simulation exercises designed to test how authorities would respond to AI-enabled cyberattacks. The initiative reflects a shift towards preparing for incidents before they occur, rather than relying exclusively on existing security procedures.

What Has the G7 Announced?

Finance leaders from the G7 group of advanced economies agreed to organise tabletop exercises simulating AI-driven cyberattacks.

The plan was confirmed by Japan's finance minister, Satsuki Katayama, following a meeting of finance ministers and central bank governors in Bangkok.

The simulations are intended to assess whether existing response procedures are effective and identify where changes may be needed.

Depending on the scenarios, private financial institutions could also participate.

These exercises are preparedness measures. They do not indicate that a particular attack against a G7 banking system has occurred.

Why Are AI Cyberattacks a Concern?

AI can help attackers automate research, identify exposed systems and adapt their techniques more quickly.

Financial institutions operate complex digital infrastructure involving payment networks, customer databases, third-party suppliers and internal business applications.

A successful attack against a critical service could affect customers, delay transactions or disrupt access to financial services.

The risk is not limited to sophisticated AI models. Poorly protected credentials, outdated software and excessive access permissions can still provide entry points for attackers.

AI may make it easier to exploit such weaknesses at scale.

What Will the Exercises Test?

Tabletop exercises typically involve simulated incidents rather than live attacks on operational systems.

Officials can examine how institutions share information, coordinate decisions and communicate with customers during a crisis.

The scenarios may also test whether existing procedures remain effective when attacks develop faster than expected.

Lessons from the exercises can inform revised response plans, clearer responsibilities and better coordination between public authorities and financial firms.

However, a successful simulation does not guarantee that every real-world incident will be handled effectively.

How Can Banks and Customers Prepare?

Financial institutions should maintain tested incident-response plans, protect privileged accounts and regularly assess third-party security risks.

Backups and recovery arrangements should be tested rather than simply assumed to work.

Customers can reduce personal exposure by enabling multi-factor authentication, using strong unique passwords and contacting their bank immediately if suspicious activity appears.

The G7 initiative highlights the importance of preparedness. As AI capabilities develop, financial resilience will depend on whether institutions can detect attacks quickly, coordinate an effective response and restore essential services safely.