ISO 27001 Annex A 5.27: Learning from information security incidents

What auditors look for

Auditors check that 5.27 is either justified as not applicable in your Statement of Applicability or implemented and working. Typical evidence includes:

• Post-incident reviews
• Actions tracked to closure
• Trend reports on incidents

How to implement 5.27 in practice

1. Hold blameless reviews
2. Turn lessons into tracked actions
3. Share anonymised lessons in training
4. Name an owner for 5.27, decide how often it runs and file evidence each time, so the control is audit-ready all year.

Recording 5.27 in the Statement of Applicability

List 5.27 with whether it applies, the reason (usually the risks it treats or a legal or contractual requirement), its implementation status and where the evidence lives. If you exclude it, explain why none of your risks or obligations require it.

Free resources

• GDPR data breach log template
• ISO 27001 and GDPR readiness assessment
• 10 steps to implement ISO 27001
• Remote ISO 27001 consultant

More organizational controls

• 5.23 Information security for use of cloud services
• 5.24 Information security incident management planning and preparation
• 5.25 Assessment and decision on information security events
• 5.26 Response to information security incidents
• 5.28 Collection of evidence
• 5.29 Information security during disruption
• 5.30 ICT readiness for business continuity
• 5.31 Legal, statutory, regulatory and contractual requirements