ECB tells eurozone banks to tighten cyber-security as AI shifts the threat picture
The European Central Bank has formally told eurozone banks they must tighten their cyber-security posture in response to AI-led attack tools, in a follow-up statement issued on Wednesday that turns earlier private guidance into something closer to a supervisory expectation.
The ECB’s vice-chair of the Single Supervisory Mechanism, Frank Elderson, framed the shift in language that signals a hardening regulatory posture rather than a discussion document.
The trigger remains Anthropic’s Mythos, the restricted-access AI model that can autonomously discover and exploit cybersecurity vulnerabilities at machine speed. Mythos has been demonstrated to combine smaller weaknesses into more serious attacks and to reverse-engineer patches into exploitable flaws faster than older toolchains.
Access has been limited by Anthropic to roughly 40 to 50 organisations including a handful of US banks; no eurozone institution sits on the list. The ECB’s position, in Elderson’s words earlier this month, is that “lack of access is...
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