The ECB is not introducing a new cybersecurity requirement. The ECB is recognising that artificial intelligence has changed how quickly cyber risk develops, and that this changes how banks must think about operational resilience.


This matters because responsibility for operational resilience ultimately sits with a bank's management body. Faster attacker timelines therefore become a governance issue as much as a technical one.


What has changed?

The challenge is that attackers can identify and exploit opportunities much faster than before.
Weaknesses that may once have allowed days or weeks for remediation can now be identified and exploited in far less time. As a result, unresolved vulnerabilities become more dangerous, while delays in patching, third-party dependencies and legacy infrastructure carry greater operational risk.


Consider a bank that completes an external penetration test in March. By September, new cloud services may have been deployed, third-party integrations updated and fresh vulnerabilities disclosed.

The original assessment may still be accurate for the day it was performed, but it no longer reflects today's operating environment.


The ECB calls on banks to strengthen several key areas:
● Accelerate vulnerability and patch management.
● Improve monitoring and detection capabilities.
● Review third-party ICT risk.
● Prioritise internet-facing assets.
● Strengthen response and recovery capabilities.


These are not new priorities. What has changed is the pace at which they must now be executed.

Why this matters for boards and executive leadership

Banks already operate under DORA, which establishes clear expectations for ICT risk management and operational resilience. The ECB's message reinforces those expectations by recognising that attacker timelines have changed. For banks, this is less about adopting new controls and more about ensuring existing assurance processes can keep pace with a faster operating environment. Decisions about ICT investment, governance, staffing and organisational risk appetite now have a direct impact on cyber resilience.


For boards, the questions become less technical and more strategic:
● Can we identify critical exposure quickly enough?
● Can we prioritise the risks that matter most?
● Can our organisation respond at the speed today's threat landscape demands?


How this changes the operating reality for banks

For many years, periodic assurance aligned reasonably well with the pace of organisational change. Infrastructure evolved more slowly, applications changed less frequently and attacker techniques took longer to become operational.


Traditional assurance activities remain important, but they were designed for a slower operating environment.
Annual penetration tests, scheduled assessments and periodic governance reviews still provide valuable independent assurance.

However, banking environments no longer stand still between those activities.
Cloud infrastructure evolves. New applications are introduced. Third-party relationships change.
At the same time, attackers continue to adapt their methods, increasingly assisted by AI.
The issue is not that annual testing has become ineffective. It is that the assumptions confirmed during testing can change long before the next assessment takes place.
Banks need confidence that critical attack paths remain closed as their environments evolve, not only when formal testing takes place.


Why organisations need to think beyond annual testing

Independent penetration testing remains essential, but the assurance it provides has a much shorter shelf life. However, it answers one question:
Were we secure when we were tested?

Increasingly, banks need to answer another:
Are we still secure today?

This is the distinction between testing and validation. Testing provides assurance at a point in time. Validation provides confidence that critical attack paths remain closed as the organisation changes.
Continuous validation complements traditional testing by confirming that security assumptions remain valid as environments evolve.

Continuous validation helps organisations:
● Replace assumptions with evidence of real attack paths.
● Identify changing exposure between formal assessments.
● Prioritise remediation based on validated attacker exposure.
● Build confidence in operational resilience over time.

What can banks do?

The ECB is not asking banks to rethink the fundamentals of cyber resilience. It is asking them to recognise that those fundamentals now operate on much shorter timescales.


That means:
● Treating cyber resilience as a board-level responsibility, not solely an ICT issue.
● Continuously validate exposure as infrastructure, applications and third-party
relationships evolve.
● Prioritising remediation based on proven attacker exposure, not theoretical risk alone.


For many organisations, this means looking beyond annual penetration testing towards continuous validation.
There are several ways organisations can introduce continuous validation into their security programme. One increasingly adopted approach is autonomous red teaming, which continuously validates real attack paths through safe exploitation as environments evolve.


How Hackurity approaches continuous validation

Hackurity delivers autonomous red teaming that continuously simulates real attacker behaviour. By safely validating attack paths and proving exposure, we help organisations move beyond point-in-time assessments towards continuous, attacker-led validation.

Human experts provide contextual review and remediation guidance.