The company invests in security software, the IT team configures firewalls and backups, and employees undergo training. But how does management know if all this is working? Whether the right measures are in place at the right locations? Or whether they comply with NIS2 or ISO 27001? The answer is a security audit: an independent, structured assessment of the security status.
The word "audit" conjures unpleasant associations for many managers, top-down control, fault-finding, sanctions. In reality, a well-conducted security audit is advisory toolhelps an organisation understand its own security situation and make informed decisions.
Types of security audits
A security audit is not a single specific procedure; it is an umbrella term for various types of assessment with different focuses and depths.
Technical safety audit
It focuses on the technical layer of the IT environment: configuration of servers and network elements, access and identity management, patch status and vulnerabilities, encryption and data protection, logging and monitoring. The output is a specific list of technical findings with priorities and recommendations for remediation. A technical audit can be combined with a vulnerability assessment or penetration test.
Process audit
It verifies whether an organisation has defined security processes and whether it actually adheres to them. This includes: incident management (do you have an IR plan and do you know where it is?), access management (are accounts of departed employees deactivated?), change management (are IT changes documented?), staff training (is there verifiable evidence?), supplier management (do you verify the security of key suppliers?). A process audit reveals gaps between what a company says it does and what it actually does.
Compliance audit
Verifies compliance with specific regulatory frameworks, NIS2, GDPR, ISO 27001, PCI DSS, and industry standards. The auditor works with the control points of the relevant standard and assesses the extent to which the organisation meets them. The output is a GAP analysis: what is missing, how severe the missing measures are, and the priority of the recommended steps.
Safety audit phase
Regardless of the audit type, a professional assessment is carried out in structured phases.
Phase 1: Scoping: what is audited
Before starting the audit, the scope must be precisely defined: which parts of the organisation, systems and processes are subject to the audit. Auditing the entire organisation at once is impractical for large companies: a more effective approach is an annual audit plan covering different areas sequentially.
As part of the scoping phase, the following are also defined: audit objectives (compliance, risk identification, certification preparation), reference framework (ISO 27001, NIS2, internal policy), assessment depth (document review, interviews, technical testing), timeline and contact persons within the organisation.
Phase 2: Assessment: information gathering and evaluation
This phase forms the core of the audit. The auditor combines various methods:
- Review of documentation - security policies, procedures, records, contracts, training logs
- Interviews - with the IT team, management and key users; the aim is to verify whether documented processes correspond to reality.
- Technical inspection - system configurations, vulnerability scan results, log records, access rights
- Physical inspection - access to the server room, locking of workplaces, physical security measures
- Observation - observation of actual employee behaviour and processes
Key principle: an audit seeks evidence, not declarations. "We have implemented a password management policy" is a declaration: the evidence is the policy as a document, records of employee training and technical verification of settings in systems.
Phase 3: Analysis and Evaluation
Collected information is structured, analysed and evaluated. Each finding is assessed in terms of severity: what safety risk does it pose? What is the likelihood of an incident? What would be the impact? Findings are typically classified as critical, high, medium or low severity.
Phase 4: Reporting: final report
The output report is the final product of the audit. A quality report is structured for two different readers:
Executive summary (for management and the board): overall score or security maturity level, most critical findings explained in business terms (not technical jargon), recommended priorities and estimated investment, comparison with the previous audit (if available).
Technical section (for the IT team and CISO): every finding described in detail, what was discovered, how it was discovered, the associated risk, and specific remediation recommendations with estimated effort. An action plan (remediation roadmap) with time horizons should also be included.
How to work with audit results
The biggest mistake companies make is letting the audit report gather dust in a drawer. An audit is only valuable if the organisation acts on it.
Prioritisation and remediation plan
Not everything can be repaired at once, and that is not necessary. The correct procedure:
- Critical findings: immediate measures (days to weeks)
- High findings: short-term plan (months)
- Medium-term findings: medium-term plan (quarter)
- Low findings: long-term planning or risk acceptance with documentation
Every finding must have an assigned owner: the person responsible for rectification, and a deadline. Without ownership, rectification will never be carried out.
Monitoring of the rectification process
Audit results should be reviewed regularly (monthly or quarterly): how many findings have been rectified, how many are in progress, what is stuck and why. This reporting belongs on the management table: the organisation's security situation is a managerial responsibility, not just an IT issue.
Re-audit, repeating the audit after implementing measures, verifies that findings have been actually removed and new measures are working. Ideally, it takes place within 6-12 months of the original audit.
A security audit is not a one-off event; it is part of a continuous security cycle: audit → plan → implementation → re-audit. Companies that carry out audits regularly systematically raise their security level and simultaneously build a documented history for regulatory inspections. If you are planning your first or a repeat security audit, SecureOn.cz team handles the entire process from defining the scope to the final report with an action plan.