ISO/IEC 27035 ISO/IEC 27035 vs NIST SP 800-61 Rev. 3
Compare the ISO/IEC 27035 series with NIST SP 800-61 Rev. 3 incident-response guidance and show how organizations can use both.
ISO/IEC 27035 is voluntary guidance, not a law or standalone certification scheme. Validate legal, contractual, regulatory, and certification claims against the controlling source.
Use ISO/IEC 27035 when you want a defined five-phase information security incident-management process with separate preparation and ICT operations guidance. Use NIST SP 800-61 Rev. 3 when you want incident response integrated across Cybersecurity Framework 2.0 risk management through a . Both are adaptable guidance, and neither creates a universal reporting deadline or certifies an organization.
Side-by-side comparison
ISO/IEC 27035 vs NIST SP 800-61 Rev. 3: scope, duties, evidence, and decision rule
This comparison maps the ISO/IEC 27035 series to NIST SP 800-61 Rev. 3's without treating either voluntary guide as law or certification.
ISO/IEC 27035 provides a five-phase process in Part 1, preparation and learning guidance in Part 2, ICT response operations in Part 3, and multi-organization coordination guidance in Part 4.
Second framework
NIST SP 800-61 Rev. 3
NIST SP 800-61 Rev. 3 is an April 2025 that integrates incident response across Govern, Identify, Protect, Detect, Respond, and Recover.
ISO/IEC 27035 vs NIST SP 800-61 Rev. 3: scope, duties, evidence, and decision rule
Choose the lifecycle vocabulary that fits the organization, then map equivalent roles, decisions, records, and improvement actions. NIST explicitly allows organizations to use the incident-response lifecycle model that suits them best.
ISO/IEC 27035 uses management, an incident coordinator, an Incident Management Team, Incident Response Teams, points of contact, monitoring teams, business roles, and external responders according to the organization's design.
NIST identifies leadership, incident handlers, technology professionals, legal, public affairs and media relations, human resources, physical security, asset owners, third parties, and other internal or external participants.
Readiness precedes an incident; reported events are assessed against organization-defined criteria and then closed or handled through the five-phase process.
Preparation and lessons learned sit across Govern, Identify, and Protect. Potentially adverse events are analyzed through Detect to determine whether they meet defined incident criteria; once an incident is declared, the response plan is executed and applicable Respond and Recover outcomes follow.
NIST SP 800-61 Rev. 3 provides prioritized CSF 2.0 outcomes plus recommendations and considerations for preparation, detection, response, recovery, and improvement; they are not comprehensive or universally applicable.
Map the ISO process to the relevant CSF outcomes, retaining each publication's status as adaptable guidance and documenting organization-specific choices.
ISO/IEC 27035 records include policy and plan, team authority, event and incident reports, the incident register, assessment and priority decisions, response logs, evidence, communications, closure, and lessons.
Keep one chronology and evidence store where possible. Tag the ISO phase and CSF outcome, preserve provenance, and identify the owner and acceptance criteria for each decision.
ISO/IEC 27035 adoption can be evaluated through exercises, internal audits, customer assurance, management review, and governance review; the guidance itself is not a standalone certification scheme.
NIST SP 800-61 Rev. 3 is guidance, not a certification scheme or statute. Other laws, government policies, contracts, or customer requirements may separately require its use or particular incident practices.
Evaluate implementation against the chosen profile and operating evidence. Test legal and contractual compliance against the controlling sources rather than inferring it from NIST alignment.
Rev. 3 can map the same records to governance, asset and supplier context, detection, analysis, response, recovery, communications, and improvement outcomes.
Reuse the record when it represents the same event and decision. Add the missing CSF context or ISO process detail instead of duplicating the incident.
Choose the lifecycle vocabulary that fits the organization, then map equivalent roles, decisions, records, and improvement actions. NIST explicitly allows organizations to use the incident-response lifecycle model that suits them best.
ISO/IEC 27035 uses management, an incident coordinator, an Incident Management Team, Incident Response Teams, points of contact, monitoring teams, business roles, and external responders according to the organization's design.
NIST identifies leadership, incident handlers, technology professionals, legal, public affairs and media relations, human resources, physical security, asset owners, third parties, and other internal or external participants.
Readiness precedes an incident; reported events are assessed against organization-defined criteria and then closed or handled through the five-phase process.
Preparation and lessons learned sit across Govern, Identify, and Protect. Potentially adverse events are analyzed through Detect to determine whether they meet defined incident criteria; once an incident is declared, the response plan is executed and applicable Respond and Recover outcomes follow.
NIST SP 800-61 Rev. 3 provides prioritized CSF 2.0 outcomes plus recommendations and considerations for preparation, detection, response, recovery, and improvement; they are not comprehensive or universally applicable.
Map the ISO process to the relevant CSF outcomes, retaining each publication's status as adaptable guidance and documenting organization-specific choices.
ISO/IEC 27035 records include policy and plan, team authority, event and incident reports, the incident register, assessment and priority decisions, response logs, evidence, communications, closure, and lessons.
Keep one chronology and evidence store where possible. Tag the ISO phase and CSF outcome, preserve provenance, and identify the owner and acceptance criteria for each decision.
ISO/IEC 27035 adoption can be evaluated through exercises, internal audits, customer assurance, management review, and governance review; the guidance itself is not a standalone certification scheme.
NIST SP 800-61 Rev. 3 is guidance, not a certification scheme or statute. Other laws, government policies, contracts, or customer requirements may separately require its use or particular incident practices.
Evaluate implementation against the chosen profile and operating evidence. Test legal and contractual compliance against the controlling sources rather than inferring it from NIST alignment.
Rev. 3 can map the same records to governance, asset and supplier context, detection, analysis, response, recovery, communications, and improvement outcomes.
Reuse the record when it represents the same event and decision. Add the missing CSF context or ISO process detail instead of duplicating the incident.
Should an organization use ISO/IEC 27035 or NIST SP 800-61 Rev. 3?
Many organizations can use both. ISO/IEC 27035-1 defines plan and prepare; detect and report; assess and decide; respond; and learn lessons. Part 2 expands preparation and learning, while Part 3 covers ICT detection, notification, triage, analysis, evidence storage, containment, eradication, recovery, and reporting operations.
NIST SP 800-61 Rev. 3 is an April 2025 . Govern, Identify, and Protect support prevention, preparation, impact reduction, and improvement; Detect, Respond, and Recover cover discovery, management, containment, eradication, recovery, reporting, and communications. NIST says organizations may use the incident-response lifecycle model that suits them best, so a one-to-one phase conversion is unnecessary.
Use Rev. 3 for current NIST alignment; it superseded Rev. 2 and has a materially different scope and structure.
Select one vocabulary for live response, then map roles, decision states, records, communications, and improvement actions to the other publication.
Add laws, regulations, contracts, insurer terms, and sector requirements as separate overlays with their own thresholds, recipients, content, and clocks.
Which records should prove ISO/IEC 27035 vs NIST SP 800-61 Rev. 3 is implemented correctly?
Use operating records, not a crosswalk alone. ISO/IEC 27035 evidence should show the incident policy and plan, Incident Management Team and Incident Response Team authority, reporting channels, tested assessment criteria, event and incident registers, response actions, evidence handling, closure, and lessons learned.
NIST-aligned evidence should connect the same incident to CSF outcomes: governance decisions, asset and supplier context, risk and vulnerability information, monitoring and adverse-event analysis, incident declaration and prioritization, investigation records, containment and eradication, recovery validation, communications, and improvement actions. Preserve integrity and provenance for incident data, metadata, and investigation records.
Preparation: approved policy and plan, roles and alternates, contacts, supplier responsibilities, asset and service priorities, playbooks, training, exercises, tools, and protected communication channels.
How should teams run one workflow against both publications?
Before incidents, assign leadership, incident handlers, technology owners, legal, communications, human resources, physical security, business continuity, asset owners, and relevant third parties. Define event sources, reporting routes, declaration criteria, response authority, evidence rules, external notification overlays, service priorities, and secure out-of-band communications. Exercise the people and decisions, not only the technical playbook.
During an event, detect and report it, preserve the original facts, assess whether it is an incident, assign priority, and activate the needed responders. Analyze scope and root cause, record actions and evidence provenance, contain and eradicate the cause, restore affected assets and operations, validate recovery, communicate with authorized parties, and revise the assessment as facts change.
Keep ISO phase and CSF outcome tags on the same incident record instead of creating duplicate tickets.
Track external legal and contractual reporting separately because neither guide supplies the controlling threshold or deadline.
Feed lessons into risk assessment, safeguards, monitoring, plans, exercises, supplier requirements, and response procedures as soon as the lesson is reliable.
What mistakes make ISO/IEC 27035 vs NIST SP 800-61 Rev. 3 weak or hard to audit?
Do not map the superseded Rev. 2 phases as if they were Rev. 3. Rev. 3 still shows the old model for context, but its recommendations are organized as a and place continuous improvement across the lifecycle.
Do not reduce either publication to a security operations center checklist. Both depend on leadership, business and asset owners, legal and communications roles, suppliers, continuity planning, risk decisions, and recovery priorities.
Do not force every event into an incident record; preserve the assessment and close false positives or non-incidents under defined criteria.
Do not treat a CSF mapping or ISO procedure as proof that responders followed it.
Do not overwrite early facts, decisions, or evidence when the scope and priority change; preserve the chronology and provenance.
How should teams review and improve ISO/IEC 27035 vs NIST SP 800-61 Rev. 3 over time?
ISO/IEC 27035 treats learning as a defined phase and calls for improvements to incident management, risk work, controls, and response-team performance. NIST Rev. 3 uses the CSF Identify Improvement category across all Functions, so lessons can be recorded and acted on during preparation, detection, response, and recovery rather than waiting for final closure.
For each finding, record the evidence, affected policy or control, risk, owner, due date, planned change, acceptance test, and verification result. Re-run the failed scenario or control. Update the crosswalk only after the operating process changes.
Review plans periodically and after material incidents, exercises, supplier changes, architecture changes, and new reporting obligations.
Measure response outcomes that support decisions, such as time to assess, containment effectiveness, recovery validation, repeat causes, and overdue actions.
Escalate unresolved authority, staffing, tooling, supplier, evidence, and recovery risks to leadership.