ISO 27001 Access Review Log Template

Introduction

Protecting valuable information is a priority for every organization. ISO/IEC 27001:2022 provides requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). An important part of this system is controlling who can access information, applications, infrastructure, and other associated assets. Access rights can become outdated when employees change roles, contractors complete assignments, projects end, systems are replaced, or responsibilities evolve. Users may also accumulate permissions over time, creating excessive access and increasing the risk of unauthorized disclosure, alteration, misuse, or loss of information.

ISO 27001 Requirements Relevant to Access Reviews

The source content refers to ISO/IEC 27001:2013 control A.9.2.4, which used the title “Review of user access rights.” The ISO/IEC 27001:2022 control structure is different. The most directly relevant current control is:

• Control 5.18 – Access rights: Supports the provisioning, review, modification, and removal of access rights according to the organization’s topic-specific access-control policy and rules.
  
  

Other supporting controls may include:

• Control 5.15 – Access control: Supports the establishment and implementation of rules governing physical and logical access.
  
  

• Control 5.16 – Identity management: Supports management of identities throughout their lifecycle.
  
  

• Control 5.17 – Authentication information: Supports appropriate allocation and management of authentication information.
  
  

• Control 8.2 – Privileged access rights: Supports restriction and management of privileged permissions.
  
  

• Control 8.3 – Information access restriction: Supports access restrictions based on the organization’s policy and requirements.
  
  

• Control 8.4 – Access to source code: Supports appropriate management of access to source code, development tools, and software libraries where relevant.
  
  

• Control 8.5 – Secure authentication: Supports secure authentication based on access restrictions and security requirements.

The frequency and depth of access reviews should be determined by risk, not by an assumed universal timetable. Critical systems, privileged accounts, sensitive information, and external-party access may require more frequent review than low-risk access.

Why ISO 27001 Access Reviews Matter

• Reduced unauthorized access: Reviews identify permissions that no longer match a user’s responsibilities or business need.
  
  

• Least-privilege enforcement: Reviewers confirm that users retain only the minimum access required to perform authorized tasks.
  
  

• Privileged-access oversight: High-risk administrative and powerful permissions receive focused scrutiny.
  
  

• Improved audit readiness: Completed logs provide documented evidence of review decisions, approvals, actions, and verification.
  
  

• Better user lifecycle management: Reviews help detect access that was not updated during onboarding, transfer, extended leave, contract changes, or offboarding.
  
  

• Lower operational cost: Removing dormant accounts or unnecessary licenses may reduce administration and software costs.
  
  

• Clear accountability: Managers, system owners, data owners, administrators, and reviewers have documented responsibilities.
  
  

• Risk mitigation: Reviews reduce exposure to data leakage, fraud, accidental changes, compromised accounts, and segregation-of-duties conflicts.

An access review log supports ISO 27001 conformity, but a completed spreadsheet or form alone is not sufficient. Required changes must also be implemented, verified, retained as evidence, and reflected in related identity and access management records.

1. Review Identification and Scope

This component establishes the boundaries, ownership, timing, and criteria of the access review.

• Review ID: Assign a unique identifier to the review cycle.
  
  

• Review title: Use a clear description such as “Quarterly Privileged Access Review – Finance Systems.”
  
  

• Review period: Record the dates or period covered by the review.
  
  

• Review start and due dates: Define when the review begins and when all decisions and actions must be completed.
  
  

• System, application, or asset: Identify each platform, database, cloud service, network resource, repository, physical area, or other asset included.
  
  

• Business owner: Identify the person accountable for the service or business process.
  
  

• System owner: Identify the person accountable for the application or technical service.
  
  

• Information owner: Identify the person accountable for the information where this role is separate from the system owner.
  
  

• Account population: Define which employees, contractors, suppliers, service accounts, shared accounts, privileged accounts, and emergency accounts are included.
  
  

• Risk classification: Record the criticality or risk level used to determine review frequency and depth.
  
  

• Review criteria: Define how reviewers will assess business need, least privilege, role alignment, activity, segregation of duties, and policy compliance.

The scope should be reconciled with authoritative sources so that omitted, hidden, disabled, dormant, service, and externally managed accounts are not overlooked.

2. User, Account, and Access Details

This component records the identity, account, current permissions, and contextual information required for an informed decision.

• Account or user ID: Record the unique login, service-account name, email address, or identity reference.
  
  

• User name: Record the individual associated with the account, if applicable.
  
  

• Account type: Identify whether the account is standard, privileged, service, shared, emergency, guest, supplier, or another category.
  
  

• Employment or engagement status: Record whether the person is active, on leave, transferred, departing, terminated, or externally engaged.
  
  

• Department and role: Record the user’s current organizational unit, position, and business responsibilities.
  
  

• Line manager: Identify the manager responsible for validating business need.
  
  

• Assigned roles and permissions: Describe the current groups, profiles, roles, entitlements, authorizations, and resource-level access.
  
  

• Privilege level: Identify administrative, approval, export, deletion, configuration, security, or other high-impact capabilities.
  
  

• Access justification: Record the approved business reason for retaining the access.
  
  

• Access source: Identify whether access was assigned directly, through a group, inherited, role-based, automated, or granted through an exception.
  
  

• Date granted or last changed: Record when the access was established or most recently modified where available.
  
  

• Last access or activity date: Record recent usage information where the source is reliable and relevant.
  
  

• Expiry date: Identify temporary or time-bound access that should terminate automatically or be reviewed before renewal.

Last-access data can help identify dormant accounts, but inactivity alone does not always prove that access is unnecessary. Some emergency, service, seasonal, and continuity-related accounts may be rarely used but still required.

3. Review Decision and Risk Evaluation

This component records the reviewer’s assessment, rationale, and authorization.

• Review outcome: Use consistent decisions such as Retain, Modify, Revoke, Suspend, Pending Clarification, or Escalate.
  
  

• Business-need validation: Confirm whether the access remains necessary for the user’s current responsibilities.
  
  

• Least-privilege assessment: Determine whether the user has more access than required.
  
  

• Segregation-of-duties check: Identify conflicting permissions or combinations that could enable fraud, error, or unauthorized activity.
  
  

• Privileged-access assessment: Apply enhanced scrutiny to administrative, security, configuration, approval, and high-impact rights.
  
  

• Activity assessment: Consider whether access appears unused, dormant, unusual, or inconsistent with the user’s role.
  
  

• Exception status: Identify access retained through an approved exception and verify that the exception remains valid.
  
  

• Reviewer rationale: Record why access is being retained, changed, revoked, suspended, or escalated.
  
  

• Required action: Describe the exact permission, group, role, or account change that must be completed.
  
  

• Risk rating: Assign a risk or priority level to required actions where appropriate.
  
  

• Reviewer identity: Record the reviewer’s name, role, date, and reliable electronic approval or signature.
  
  

• Additional approval: Record approval from the system owner, information owner, information security function, or another authority when required.

A response of “approved” without a clear evaluation may not provide meaningful assurance. Reviewers should compare access against the user’s current role, not simply confirm that the account already exists.

4. Action, Verification, and Closure

This component tracks the implementation of review decisions and ensures that the review is not closed while important actions remain incomplete.

• Action owner: Identify the administrator, identity-management team, system custodian, or other person responsible for implementing the decision.
  
  

• Target date: Set a completion deadline based on risk and urgency.
  
  

• Date of action: Record when the permission or account was changed, suspended, or removed.
  
  

• Action taken: Record the actual technical or administrative change completed.
  
  

• Implementation reference: Link to the service ticket, IAM workflow, change record, system log, or other supporting evidence.
  
  

• Verification result: Confirm that the implemented access matches the approved decision.
  
  

• Verified by: Record the verifier’s identity and verification date.
  
  

• Residual issue: Record any remaining access, dependency, technical limitation, or accepted exception.
  
  

• Closure status: Use statuses such as Completed, Open, Overdue, Risk Accepted, Cancelled, or Escalated.
  
  

• Closure approval: Record the person who confirms that the review and associated actions are complete.
  
  

• Next review date: Schedule the next review according to the risk-based review frequency.

Where a change cannot be implemented immediately, the organization should document the reason, interim safeguards, accountable owner, revised date, and escalation or risk decision.

Roles and Required Competence Areas

• Review Coordinator – process governance: Must understand the review schedule, scope, evidence requirements, status tracking, escalation, and closure criteria.
  
  

• Line Manager – business-role knowledge: Must understand the user’s responsibilities and determine whether current access remains necessary.
  
  

• System Owner – system authorization: Must understand the system’s permission model, criticality, user groups, and operational requirements.
  
  

• Information or Data Owner – sensitivity and permitted use: Must understand the classification, disclosure conditions, and authorized uses of the information.
  
  

• Information Security Representative – risk and control competence: Must understand least privilege, privileged access, segregation of duties, authentication, exceptions, monitoring, and information security risk.
  
  

• IAM or IT Administrator – technical implementation: Must understand identity sources, accounts, groups, entitlements, provisioning, deprovisioning, and evidence retention.
  
  

• Reviewer – objective evaluation: Must be able to compare actual permissions with job responsibilities, approved profiles, policy rules, and activity information.
  
  

• Verifier – implementation assurance: Must be able to confirm that required changes were implemented completely and accurately.

Eight Steps for Implementing the Access Review Process

1. Define the Scope and Risk-Based Frequency

Identify the systems, information, accounts, permissions, and user groups that require review. Set frequencies according to criticality, sensitivity, privilege, external access, contractual requirements, and risk.

2. Assign Owners, Reviewers, and Escalation Routes

Assign the Review Coordinator, Line Managers, System Owners, Information Owners, Information Security Reviewers, Administrators, and Verifiers. Define alternates and escalation routes for overdue or disputed decisions.

3. Build a Complete Access Population

Extract users, accounts, roles, groups, direct permissions, inherited access, privileged accounts, service accounts, shared accounts, supplier accounts, disabled accounts, and relevant activity data from authoritative sources.

4. Prepare the Review Log and Instructions

Populate the four matrix components, explain each outcome, define the evidence expected, provide a deadline, and tell reviewers how to handle unclear ownership, exceptions, conflicts, and technical questions.

5. Conduct and Document the Review

Ask reviewers to compare each account and permission against current employment status, job role, business need, least privilege, segregation of duties, access activity, and approved exceptions. Require a documented decision and rationale.

6. Implement Required Actions

Assign owners and deadlines for modifications, revocations, suspensions, expiry corrections, or further investigation. Prioritize high-risk and privileged-access findings.

7. Verify Completion and Retain Evidence

Confirm that requested changes were implemented accurately, reconcile unresolved items, obtain closure approval, and store logs and supporting records in a secure, controlled location.

8. Measure and Improve the Process

Track completion rates, overdue reviews, excessive access, dormant accounts, repeated findings, action timeframes, exceptions, and reviewer quality. Use lessons from audits, incidents, and feedback to improve the process.

Benefits of a Structured Access Review Process

• Stronger security: Excessive, inappropriate, dormant, and unauthorized access is identified and addressed.
  
  

• Improved least privilege: Permissions remain aligned with current responsibilities rather than historical job needs.
  
  

• Better privileged-access control: Powerful accounts receive focused and traceable review.
  
  

• Clearer accountability: Review, authorization, implementation, verification, and closure responsibilities are recorded.
  
  

• Improved audit evidence: The organization can demonstrate a repeatable process and completed follow-up actions.
  
  

• Reduced access creep: Permissions accumulated through transfers, projects, or temporary duties are removed when no longer required.
  
  

• Operational efficiency: Dormant accounts, duplicate identities, and unnecessary licenses can be identified.
  
  

• Improved user lifecycle management: Review findings reveal weaknesses in joiner, mover, and leaver controls.

Best Practices for Effective Access Reviews

• Use a risk-based approach: Review privileged access, critical systems, sensitive information, and external-party access more frequently or thoroughly.
  
  

• Use authoritative data: Reconcile system access with HR, contractor, supplier, identity, and asset records.
  
  

• Review actual permissions: Include group membership, inherited permissions, direct entitlements, service accounts, and shared accounts where applicable.
  
  

• Separate review from implementation: Where practical, the person approving access should not be the only person implementing and verifying the change.
  
  

• Integrate joiner, mover, and leaver processes: Use review findings to correct identity-lifecycle weaknesses.
  
  

• Centralize controlled records: Store review logs and supporting evidence in a protected, searchable, and access-controlled location.
  
  

• Automate carefully: Use IAM or governance tools to gather data, route decisions, track actions, and retain evidence while preserving accountable human decisions.
  
  

• Escalate overdue actions: Do not close a review simply because reviewers submitted their decisions; required changes must be tracked to completion.

Common Challenges and Recommended Responses

• Challenge – incomplete account inventory: Response: Reconcile identity, HR, directory, application, supplier, and privileged-account sources before distributing the review.
  
  

• Challenge – reviewers approve everything: Response: Provide role profiles, risk guidance, permission descriptions, and targeted training; sample decisions for quality.
  
  

• Challenge – unclear permissions: Response: Translate technical roles and groups into understandable business capabilities and risks.
  
  

• Challenge – review fatigue: Response: Apply risk-based frequencies, divide large reviews into manageable scopes, and remove duplicate or irrelevant records.
  
  

• Challenge – unresolved ownership: Response: Maintain system and information owners and escalate orphaned systems or accounts to management.
  
  

• Challenge – changes are not implemented: Response: Assign action owners, deadlines, reminders, risk-based priorities, and closure verification.
  
  

• Challenge – dormant accounts remain active: Response: Investigate business need, account type, dependencies, and activity before disabling or removing access.
  
  

• Challenge – temporary access does not expire: Response: Require expiry dates, automated revocation where possible, and exception approval for extensions.
  
  

• Challenge – regulatory language is applied incorrectly: Response: Reference GDPR, HIPAA, SOX, or other obligations only after confirming that they apply to the organization, system, information, and jurisdiction.
  
  

• Challenge – evidence is scattered: Response: Use unique review IDs, controlled storage, consistent filenames, workflow links, and defined retention requirements.

Recommended Access Review Metrics

• Review completion rate: Percentage of scoped records reviewed by the deadline.

• Action completion rate: Percentage of required modifications or revocations completed and verified.

• Overdue decisions: Number of review records awaiting a reviewer decision.

• Overdue actions: Number of approved changes not implemented by the target date.

• Excessive-access findings: Number or percentage of accounts requiring reduced permissions.

• Dormant-account findings: Number of inactive or unused accounts requiring investigation.

• Privileged-access findings: Number of privileged accounts modified, revoked, or escalated.

• Segregation conflicts: Number of conflicting access combinations identified and resolved.

• Repeated findings: Number of issues recurring across review cycles.

Metrics should support improvement rather than encourage superficial completion. A high completion rate is not meaningful if decisions are inaccurate or corrective actions remain unresolved.

Conclusion

An ISO 27001 Access Review Log is a practical tool for confirming that access rights remain appropriate, necessary, and consistent with the organization’s security requirements. It helps identify excessive permissions, dormant accounts, privileged-access risks, ownership gaps, and weaknesses in joiner, mover, and leaver processes. Organizing the log into four structured components creates a traceable path from review planning through decision, action, verification, and closure. Following the eight implementation steps helps ensure that reviews are complete, risk-based, repeatable, and supported by reliable evidence. When the process is aligned with ISO/IEC 27001:2022 control 5.18 and related access controls, the organization can strengthen least privilege, improve accountability, reduce unauthorized access, and demonstrate that access rights are actively managed throughout their lifecycle.