ISO/IEC 27005
Plain-language ISO/IEC 27005:2022 hub for context, criteria, assessment, treatment, residual-risk acceptance, communication, monitoring, review, and ISMS evidence.
ISO/IEC 27005:2022 gives organizations of every type, size, and sector guidance for managing information security risk in support of an ISO/IEC 27001 information security management system (ISMS). It is aimed at organizations implementing or improving an ISMS and at ISMS professionals, risk owners, and other people involved in risk decisions. The standard is guidance, not a law, required scoring formula, or standalone certification scheme, although legislation, a regulator, a contract, or an internal policy can create a separate obligation to use it.
ISO lists the fourth edition as published on 25 October 2022 and the 2018 edition as withdrawn. There is no ISO/IEC 27005 transition deadline or fixed reassessment interval. Define context, basic interested-party requirements, and risk criteria first. Then identify risks and owners; analyse consequence and likelihood; evaluate against the criteria; select, plan, and implement treatment; obtain the 's approval of the plan and decision on ; and keep the process communicated, recorded, monitored, and reviewed.
Define consequence, likelihood, level-of-risk, acceptance, exception, time-limit, and delegated-authority rules.
Describe a causal path from source or event to an unwanted consequence, then assess it with scope-specific evidence.
Keep the owner, plan version, control status, residual assessment, authority, conditions, and reassessment trigger traceable.
Set the assessment purpose and boundary, applicable legal and contractual requirements, consequence and likelihood scales, acceptance rules, and decision authority before scoring starts.
Use event-based or asset-based identification, assign an authorized , and tie consequence and likelihood to current evidence, existing controls, and stated uncertainty.
Select necessary controls, approve the treatment plan, distinguish forecast from achieved , record the acceptance decision, and monitor planned and event-driven triggers.
Start with how ISO/IEC 27005 supports an ISMS, then define the method and criteria, identify and assess scenarios, plan and implement treatment, approve or reject , and preserve enough evidence to reproduce each decision.
Confirm the ISMS scope, the standard's guidance status, the actors involved, the current edition, and the decisions that need evidence.
Define consequence, likelihood, risk-level, acceptance, authority, exception, and time rules, then create reusable prompts without importing generic scores.
Identify risks to confidentiality, integrity, and availability; assign authorized owners; analyse consequence and likelihood; evaluate against every applicable rule; and retain the rationale.
Choose necessary controls, compare them with Annex A, track implementation and effectiveness, reassess the remaining risk, and route the decision to the authorized owner.
Understand where broader or alternative methods complement the ISMS risk process without replacing it.
"Information security management systems — Requirements"
"Guidance on managing information security risks"
Next steps
Assign risk assessments, treatment decisions, acceptance records, evidence requests, and review checkpoints to the responsible people.
Answer ISO/IEC 27005 scope and interpretation questions with cited outputs.
Keep ISO/IEC 27005 evidence, decisions, and control records in one governed system.
Review scope, evidence gaps, and next implementation steps.