ISO/IEC 27001:2022 · derived mapping target
A.5.27Learning from information security incidents
Use lessons from past incidents to strengthen your defenses and reduce the chance or impact of similar events. Every incident is a chance to improve.
Mapping at a glance
A.5.27Learning from information security incidentsISO/IEC 27001:2022
A.5.27 is covered by 12 Sekit CSF controls. +7 more in the table below. Open in the full graph →
Mapped from the Sekit CSF
The Sekit controls that cover this requirement, lens by lens.
RCF-0023Internal audit · ProcessrelatedTracking audit findings to closure is the same discipline applied to a different source of gaps, audits rather than incidents, but it reinforces the closure habit this control depends on.RCF-0032Control testing program · ProcessrelatedTurning failed control tests into tracked remediation is a parallel improvement loop to incident lessons learned, sharing the same close-the-loop discipline.RCF-0035Issues management · ProcesssupportsAssigning an owner and deadline to every logged issue is the tracking mechanism that keeps post-incident corrective actions from being forgotten.RCF-0254DR exercises · ProcessrelatedFeeding disaster recovery exercise failures back into the recovery plan is the same learning loop this control asks for, applied to continuity rather than incident response.RCF-0266Playbooks · ProcesssupportsUpdating playbooks with lessons learned after each activation covers one type of improvement this control asks for, not the full range of incident knowledge A.5.27 expects to feed back into controls.RCF-0275Tabletop exercises · ProcesssupportsFeeding tabletop exercise findings back into the plan, playbooks and contact lists is one direct source of the lessons this control asks a company to act on.RCF-0277Post-incident review (lessons learned) · PolicysupportsA documented requirement for a review after every significant incident sets the policy expectation this control depends on, but requiring a review does not itself apply lessons to strengthen controls, the operational improvement A.5.27 demands.RCF-0278Post-incident review (lessons learned) · ProcessequivalentTurning post-incident findings into tracked corrective actions and verifying completion is the operational proof that lessons are applied.RCF-0279Post-incident review (lessons learned) · TechnicalenablesRetaining incident timelines and logs in tooling gives a post-incident review the data it needs to reconstruct what happened accurately.RCF-0415Problem management · PolicysupportsA written expectation that recurring incidents get investigated to root cause is the policy backbone for learning from patterns rather than one incident at a time.RCF-0416Problem management · ProcesssupportsTracking known problems by business impact and working them to resolution is what stops the same incidents from recurring, the practical outcome this control seeks.RCF-0417Problem management · TechnicalenablesTooling that surfaces patterns across incidents, recurring categories and time clusters gives root cause work a starting point grounded in data rather than memory.
NIST CSF 2.0 counterparts
Reached through the Sekit CSF controls both map to — a mapping, not a formal equivalence.
ISO/IEC 42001:2023 — Annex A counterparts
Evidence that proves this control
What an auditor, or Sekit's evidence engine, asks for.
Incident playbooks, exercises and forensics readiness
The step-by-step guides for the most likely incidents, the tabletop exercises, the post-incident review reports, and how evidence is preserved so an incident can be investigated.
From the Sekit evidence catalog
In practice
The gap here is rarely the review meeting itself, it is what happens after. A company runs a post-incident review, writes a document with good intentions, and the corrective actions sit open for months because nobody owns them once the meeting ends. Strong evidence looks like a ticketing system that shows patterns across incidents, so a root cause investigation starts from data rather than a guess. Feeding the findings back into playbooks and the response plan is what separates a company that learns from one that files reports after each incident without acting on them.
Common gaps
Post-incident review documents exist for major incidents, but the corrective actions they list are never tracked to closure or assigned an owner.
The same type of incident recurs every few months and nobody has connected the pattern, because incident data sits in tickets nobody reviews together.
Lessons learned from tabletop exercises never make it back into the actual incident response plan or playbooks.
Questions your auditor will ask
What happens to the findings from a post-incident review?
Findings become tracked corrective actions with an owner and a due date, verified closed with evidence before the review is considered complete.
How do you catch incidents that keep recurring for the same reason?
Ticketing and monitoring data are reviewed for patterns across incidents, categories and affected systems, feeding a documented problem management process.
Are tabletop exercise findings used to update the actual response plan?
Exercise results feed directly into the incident response plan, playbooks and contact lists, not a summary report that gets filed away.
Where regulation demands it
NIS2 3.6 requires post-incident reviews that turn what happened into concrete improvements, not only a closed ticket.
ENS op.cont.3 requires periodic testing, which is how tabletop and disaster recovery exercises feed lessons back into the response capability.
Related controls
Via the shared Sekit CSF topic, not the framework's own index.
Ask Sekura: “What evidence proves A.5.27?”
Also via MCP, free with account