The European Central Bank (ECB) tells eurozone banks to strengthen their cyber-security arrangements, citing changes in the threat landscape driven by AI-enabled attack tools. According to reporting, the ECB issues a formal follow-up communication that moves earlier private guidance toward a clearer supervisory expectation under the Single Supervisory Mechanism. ECB vice-chair Frank Elderson is cited as describing the need for a tighter cyber-security posture, with AI affecting how attacks can be planned, executed, and scaled. While the outlets focus on the AI angle, the core message is that banks must review and improve their cyber-security practices, including how they prepare for, detect, and respond to cyber incidents. The ECB’s move signals closer regulatory oversight of banks’ resilience as cyber risk evolves, and it positions the AI-driven shift in threat capabilities as a reason to revisit existing controls. The communication is presented as a supervisory prompt rather than a specific incident report, with emphasis on raising readiness across the sector.