NIS2 READY
Audits are more than just a compliance checkbox – they prove whether your security actually works in practice. In Europe, ransomware and availability attacks remain top concerns. Auditors therefore focus closely on patch discipline, recovery testing, strong access controls, and monitoring. ENISA’s Threat Landscape confirms these as recurring weak points, and regulators check them as well.
Breaches remain costly. IBM’s 2025 study puts the global average cost of a breach at USD 4.4 million, rising to more than USD 5 million in major European markets. This is why auditors probe how quickly organizations can detect, contain, and recover from incidents.
The lesson is simple: On audit day, the strongest evidence demonstrates quick detection, consistent containment, and effective use of automation.
Regulators focus on the same basics. GDPR enforcement activity continues to cite “insufficient technical and organizational measures,” which usually maps to weak patching, access control, logging, or recovery in real environments. Your evidence should show those controls actually work, not just that policies exist on paper.
Start by defining scope, then align to a recognized standard
List the systems, apps, cloud tenants, sites, and data classes in scope. Assign a technical owner for each and note business criticality and whether personal data is processed. Beyond IT, also ensure that every key process has a clear business owner so responsibilities are transparent.
Then structure your preparation around a familiar framework. Even if you are not seeking certification, mapping evidence to ISO/IEC 27001:2022 gives auditors a clear reference: assets, identity and access, operations security, incident management, suppliers, and continuity. Don’t forget to include your risk assessment summary and Statement of Applicability – auditors expect to see how chosen controls map to identified risks. This keeps your audit pack organized and reduces unnecessary back-and-forth during evidence review.
If you operate in the EU, align your incident process to NIS2 expectations. Be ready to demonstrate that you can meet regulatory deadlines for incident reporting (for example: early warning within 24 hours, a notification within 72 hours, and a final report within one month for significant incidents). Keep one redacted example or a drill output to demonstrate timing, roles, and handoffs.
Build a lean audit pack that demonstrates controls in action
Collect proof that controls run as designed, not just policy PDFs. Typical evidence auditors request includes:
- Assets and vulnerabilities: inventory for servers, endpoints, cloud accounts, plus 90-day patch status on critical systems.
- Access control: list of privileged accounts, MFA coverage, last quarterly access review, and joiner-mover-leaver tickets.
- Backups and recovery: schedules, the most recent restore test result, RTO/RPO targets, and off-site or immutable details.
- Logging and monitoring: log destination, retention period, sample alerts, and an incident record showing investigation and closure.
- Change management: a few changes with approvals and rollback plan, including one emergency change.
- Incident response: the playbook, the on-call roster, and one reviewed case showing detection, triage, containment, lessons learned.
- Suppliers: critical vendors, security clauses in contracts, and current assurance artifacts.
- Awareness and training: evidence of regular security training, phishing simulation results, and user completion rates.
This layout mirrors ISO 27001 control families and lines up with NIS2 themes on risk management, incident handling, and supply-chain oversight.
Address easily fixes ahead of the audit
Start with covering the simple but high-impact tasks that auditors almost always check. Remove unused admin accounts and MFA for remote and privileged access. Patch critical vulnerabilities on key systems. Verify that backups run successfully and can be restored. Make sure logs from critical systems flow into your SIEM. And finally, upgrade or remove any unsupported (end-of-life) software, since outdated versions are frequent audit findings.
These basics are often weak points in GDPR cases, and they are easy to demonstrate and create strong evidence. Run an internal audit or gap assessment beforehand to catch and fix common weaknesses. This reduces surprises on audit day.
Rehearse the walkthrough
Run a 60- to 90-minute dry run with system owners. Start with live consoles, then show the exported evidence stored in the audit folder. Keep answers short and factual. If a scan found serious findings last month, show the remediation plan and a trend chart rather than trying to hide them. Auditors value transparency and continuous improvement grounded in tickets and timestamps.
Also prepare a short management-level overview: leaders should be able to explain in a few minutes how the organization manages security, risks, and compliance. Inform relevant staff and leadership about the audit schedule and what will be expected from them during the process – this ensures everyone is prepared and avoids last-minute confusion.
Bring local context, wherever you operate
Add a short “local context” page to your audit pack. Note the rules that apply to your organization, who supervises compliance, internal audit or certification cycles, and incident-reporting deadlines. For significant incidents, demonstrate compliance with required reporting timelines and keep a redacted example or drill output as proof.
Track advisories from your national CSIRT and show how you respond. Keep one recent bulletin and your actions: search for exposure, apply patches, verify fixes. For example, in March 2024, Slovakia’s SK-CERT issued an alert on the XZ Utils backdoor (a serious backdoor hidden in a widely used software component). If attackers had exploited it, they could have taken control of affected systems. Documenting how you checked your systems, applied the patch, and confirmed the fix creates strong audit evidence. It shows that when a national authority issues an alert, your organization reacts quickly and effectively.
If you operate in Slovakia, highlight the statutory audit duty. Operators of essential services must complete a cybersecurity audit within two years of registration. In 2021, the National Security Authority reported 164 entities missed this obligation and warned of sanctions. Include your category, deadline, and proof of completion.
How to “show, not tell” on audit day
Don’t just describe your controls, demonstrate them. Start with live views of the tools you use. Walk the auditor through one end-to-end example, such as how a new admin account is requested, enrolled with MFA, reviewed quarterly and eventually removed. If personal data is involved, connect the security measures directly to GDPR obligations.
Wrap up with a one-page improvement log that lists recent fixes with ticket references and dates. This proves your controls are working owertime, not just for the audit. And don’t forget to have the results of your last internal audit or management review ready – auditors always check these first. Strong preparation not only helps you pass the audit but also strengthens your security posture in practice.
