ECB Orders Supervised Banks to Submit AI Cyber Defense Plans by October 31

Artificial intelligence is moving deeper into trading, lending, payments and bank cybersecurity, bringing efficiency gains alongside new systemic risks. Similar models used across institutions could produce herd behavior, amplify market swings and create common points of failure, while reliance on a small group of technology providers may deepen concentration risk. European Central Bank President Christine Lagarde has warned that uncontrolled or malicious use of AI could turn a technological shock into a financial crisis that destroys jobs and household savings.

Lagarde said at the Cotec Europa summit in Venice, according to a June 17, 2026 report, that the ECB had subjected 109 banks to a severe cyberattack scenario and that most weaknesses identified had been fixed. She called for a global AI governance framework modeled on the Nuclear Non-Proliferation Treaty. AI remained a central theme at the ECB’s annual forum on June 30, where officials urged scenario analysis, stress testing and international coordination as autonomous systems take a larger role in finance.

The European Central Bank is reviewing banks’ credit exposure to AI-related industries, including data centers and AI developers. AI infrastructure requires substantial capital, while concentrated lending, valuation volatility and rapid technological obsolescence could transmit industry risks to banks’ asset quality. The sector has therefore become a focus for financial supervisors.

The latest survey examines the scale of banks’ lending to the AI sector, borrower risks and internal controls. The ECB has also held a workshop to understand how banks use artificial intelligence. Reports did not disclose when the survey began, how many banks were involved, the total credit exposure or a completion timetable, indicating that the review remains at the risk-mapping and information-gathering stage.