European regulators fired a warning shot when the ECB convened 111 leading lenders on Tuesday to tackle cyber‑security gaps exposed by cutting‑edge AI. The meeting followed reports that Anthropic’s Claude Mythos could reveal thousands of high‑severity bugs in operating systems and browsers. Banks now face a ticking clock for the Eurozone financial system to avoid systemic risk.

Frank Elderson, ECB supervisory‑board vice‑chair, warned that patching speed must shift from ‘andante’ to ‘presto’. He cited the risk that a software fix could be reverse‑engineered within minutes, letting attackers exploit the very vulnerability it was meant to seal. Rapid deployment is now a market‑wide imperative for banks across the Eurozone to maintain stability.

European banks lack direct access to Mythos, which Anthropic released only to a select US cohort under Project Glasswing. Elderson urged U.S. lenders to share lessons, noting that malicious actors could soon acquire similar tools. The ECB’s ad‑hoc summit underscores regulators’ scramble to preempt cyber‑attacks that could ripple through global markets and safeguard financial stability.

With Anthropic claiming Mythos exposed thousands of critical flaws, the ECB’s push signals a new era of AI‑driven cyber‑risk compliance. Banks must now deploy patches within days, not weeks, to protect the Eurozone financial system from a technology that can turn software fixes into new attack vectors and preserve market integrity.