Thinking differently about Pen Testing…
Penetration testing has traditionally been treated as an annual exercise. Book the test, receive the report, fix what you can, and move on until next year.
But in today’s cloud-first, Microsoft-centric and AI-enabled environments, risk does not wait twelve months. New services go live, integrations change, suppliers connect, permissions shift and attack surfaces evolve continuously.
That is why organisations need to think differently about penetration testing. Not as a one-off compliance activity, but as part of an ongoing assurance model that helps validate controls, evidence compliance and give leaders confidence that digital services are secure today, not just when the last test was completed.
In this three-part series we explore:
Part 1
Why annual penetration testing is no longer enough
Part 2
How to turn findings into meaningful risk reduction
Part 3
What continuous assurance looks like in practice
Part 3: Building Continuous Assurance Through Regular Testing
Part 2 focused on turning findings into meaningful risk reduction. Once those findings have been prioritised and remediation is underway, the next challenge is making improvement continuous. The most resilient organisations build testing, remediation and validation into the way they manage cyber risk throughout the year.
The aim is not simply to test more often. It is to embed a different way of thinking, where assurance becomes continuous, evidence is maintained over time and compliance is treated as an outcome of good security practice rather than a separate annual exercise.
Instead of repeatedly revisiting the same issues, organisations can concentrate on validating improvements, testing new technologies and identifying emerging vulnerabilities.
What this looks like in practice:
Imagine an organisation is releasing a new piece of functionality within an existing web application. In a traditional model, that change might wait until the next annual penetration test. In a continuous testing model, the new functionality is assessed before release.
Because the testing team already understands the application, its architecture and the existing security boundaries, the scope can be focused on the new feature, its integration points, permissions, data flows and any changes to the attack surface. This makes testing more targeted, efficient and proportionate, while still giving the organisation confidence that the new release has not introduced avoidable risk.
This is where continuity matters. When testers have an ongoing relationship with the environment, each engagement does not need to start from scratch. Instead, testing becomes more focused, better informed and easier to align with the pace of change across the organisation.
In Microsoft cloud environments, this approach can also support stronger governance. For example, changes to Azure workloads, Microsoft 365 configurations, identity permissions or application integrations can be tested and validated as part of the release cycle. Combined with tools such as Microsoft Defender for Cloud, Secure Score, Microsoft Purview, Microsoft Sentinel and Microsoft Entra, organisations can create a stronger feedback loop between testing, monitoring, policy enforcement and remediation.
D2NA’s role is to support that journey in a practical and proportionate way. We help organisations define sensible testing cycles, align activity to risk and compliance priorities, prioritise remediation, and validate improvements over time. This gives leaders greater confidence that security controls are not only documented, but working in practice.
Compliance is often the reason organisations commission a penetration test, but it should not be the only value they take from it. The stronger outcome is a clearer understanding of which risks matter most, whether security investments are working and where remediation should be prioritised.
Ready to Build Continuous Assurance?
If penetration testing is still treated as a once-a-year exercise within your organisation, now is the time to reconsider whether that approach reflects today’s threat landscape.
D2NA works with organisations across the public sector and regulated industries to deliver CREST-aligned penetration testing, remediation guidance and continuous assurance services. We help customers understand where their greatest risks exist, prioritise action and build a sustainable approach to ongoing compliance and cyber resilience.
Speak to D2NA to explore how a continuous assurance model could support your organisation’s security, compliance and digital transformation objectives.