Practical guidance for preparation, common nonconformities, and best practices in auditing information security management systems in accordance with ISO/IEC 27001
Cyber threats continue to evolve rapidly, and requirements for organisations to protect information are becoming increasingly stringent. In this context, ISO/IEC 27001 remains one of the most recognised international frameworks for information security management.
Whether preparing for initial certification or a recertification audit, the readiness of the Information Security Management System (ISMS) is a key factor for successfully passing the audit.
Why audit preparation starts long before the audit itself
Many organisations perceive an audit as a one-time event. In reality, it is an assessment of the effectiveness of the system, not just the existence of documentation.
Good preparation means:
🔹 information security processes are actually implemented
🔹 employees are aware of their roles and responsibilities
🔹 risks are up to date, assessed, and managed.
Organisations that actively maintain their system throughout the certification cycle typically pass audits much more smoothly.
Key areas auditors examine most closely
During an ISO/IEC 27001 audit, particular attention is usually given to several critical areas.
Risk management
One of the core elements of the standard is the risk assessment and treatment process.
Auditors verify whether:
- the risk assessment methodology is clearly defined
- risks are properly and regularly identified
- selected controls are justified
- risk treatment plans are implemented.
A common issue is when risk assessments are not updated following changes in infrastructure or business processes.
Access management
Control over access to information and systems is one of the most sensitive areas.
During the audit, it is checked whether:
- access rights are defined based on roles
- procedures exist for granting, modifying, and revoking access
- access rights are reviewed periodically.
Special attention is paid to access rights of former employees and external contractors.
Information security incident management
Organisations must have a clear incident management procedure, including:
- how incidents are reported
- roles and responsibilities in response
- root cause analysis
- corrective actions
Auditors often check whether employees know how to respond in case of an incident.
Employee awareness and training
The human factor remains one of the main causes of incidents.
Therefore, the standard requires organisations to ensure:
- information security training
- regular awareness activities
- understanding of security policies
During audits, short interviews with employees are often conducted to assess their level of awareness.
Best practices for a successful audit
Organisations with a robust ISMS typically follow several best practices:
✔️ regularly update risk assessments
✔️ conduct effective internal audits
✔️ maintain active management commitment
✔️ provide regular employee training
✔️ document evidence of control implementation
These actions not only support a successful audit but also genuinely improve the organisation’s cybersecurity posture.
ISO/IEC 27001 certification should not be seen merely as a formal requirement, but as a tool for building a sustainable information security management system. Organisations that keep their system active and up to date not only pass audits more easily but also significantly reduce the risk of incidents and security breaches.