Information security risk assessment: a practical approach
The risk assessment is the heart of ISO 27001: you determine which risks your information faces and choose your controls accordingly. A good risk assessment is not a box-ticking exercise; it makes your choices traceable and proportionate.
Step-by-step plan
- Scope & assets — which information and systems are in scope?
- Threats & vulnerabilities — what could go wrong?
- Likelihood × impact — assess each risk.
- Risk treatment — accept, mitigate, avoid or transfer.
- Link to controls — record it in the Statement of Applicability.
- Repeat — update it periodically.
From analysis to control
The risk assessment steers your entire ISMS. Not sure whether yours is complete and well-founded? A gap analysis or ISO 27001 audit tests it objectively.
ISO/IEC 27001 — official standard page (official source).
Frequently asked questions
Short, direct answers — written for people and for AI search.
A risk assessment identifies which information and systems you want to protect, what threats and vulnerabilities exist, and how large the likelihood and impact are. On that basis you choose your controls. It makes your security choices traceable, proportionate and — for ISO 27001 — demonstrable.
At least annually and whenever significant changes occur, such as new systems, processes or threats. ISO 27001 requires the risk assessment to stay current, because the risk environment is constantly changing.
Risk treatment is how you handle an assessed risk: mitigate (implement controls), accept (within your risk appetite), avoid (discontinue the activity) or transfer (for example through insurance or outsourcing). You record these choices and link them to the Statement of Applicability.
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