User Access Management is the lifecycle process of granting, modifying, and revoking rights to organisational systems under ISO 27001 Control 5.18. The provision of a formal access control policy is the primary implementation requirement, delivering the business benefit of reduced insider threat risks and verified accountability.
What is User access management?
User Access Management is the process of granting, modifying, and revoking user access to an organisation’s systems and information. It is a structured approach to ensuring that users have the appropriate level of access, no more and no less, to perform their jobs. This is a lifecycle process that starts when a user joins the organisation and ends when they leave.
Key Components
- Granting Access: Providing new users with the necessary permissions and credentials to do their work.
- Modifying Access: Changing a user’s permissions when their role or responsibilities change within the organisation (e.g., a promotion or transfer).
- Reviewing Access: Regularly checking and validating that users’ access rights are still appropriate and necessary. This helps to prevent privilege creep.
- Revoking Access: Immediately removing a user’s access when their employment is terminated or their need for access ends.
ISO 27001 Context
User access management is a crucial part of ISO 27001, in particular access management to privilege (ISO 27001 Annex A 8.2 Privileged Access Rights), access restrictions (ISO 27001 Annex A 8.3 Information Access Restriction) and secure authentication (ISO 27001 Annex A 8.5 Secure Authentication). It is a preventive control that helps to enforce the principle of least privilege, which states that users should only be given the minimum level of access required to perform their duties. This is a critical security measure to protect against both internal and external threats.
How to implement User access management
Implementing a compliant User Access Management (UAM) framework is a foundational requirement for ISO 27001:2022 Control 5.18. As a Lead Auditor, I have defined these 10 technical steps to ensure your organisation formalises the full lifecycle of access, from initial provisioning to immediate revocation, ensuring 100% accountability for every identity within your technical estate.1. Provision a Formal Access Control Policy
Provision a citable Access Control Policy that defines the business requirements for access to information assets: This document serves as the technical baseline for all identity management activities. Key requirements include:
- Documenting the specific rules for user access based on the “Need to Know” principle.
- Defining the technical standards for password complexity and Multi-Factor Authentication.
- Securing formal management approval to ensure organisational enforcement.
2. Formalise Asset Owner Accountability
Assign every information asset in the Asset Register to a specific owner responsible for approving access: This process ensures that technical access is granted by those with the most context regarding the data’s sensitivity. Technical actions involve:
- Linking every application and database to a documented technical owner.
- Formalising a sign-off process for all new access requests.
- Ensuring owners are trained on the risks of unauthorised data exposure.
3. Provision a Technical Joiner Process
Provision a structured workflow for granting access to new employees and contractors: This ensures that identities are created with a consistent set of baseline permissions. Requirements include:
- Integrating the HR onboarding process with the IT provisioning system.
- Verifying that all new users have signed confidentiality agreements or NDAs.
- Documenting the specific IAM roles assigned at the point of entry.
4. Enforce the Principle of Least Privilege
Enforce granular access rights that restrict users to the minimum permissions necessary for their specific job function: This reduces the potential “blast radius” of a security incident. Implementation steps involve:
- Reviewing existing role-based access control (RBAC) configurations.
- Revoke any “all-access” or legacy administrative permissions from standard users.
- Utilising technical security groups to manage access at a departmental level.
5. Provision Multi-Factor Authentication (MFA)
Enforce MFA for 100% of remote access and privileged administrative logins: MFA is a primary technical safeguard expected by UKAS auditors to mitigate credential theft. Necessary actions include:
- Configuring conditional access policies for all cloud-native SaaS platforms.
- Implementing hardware tokens or authenticator apps for high-sensitivity systems.
- Auditing the MFA enrolment status of all active user accounts.
6. Audit User Access Rights Periodically
Audit the user registry at planned intervals, typically quarterly, to ensure that existing access remains appropriate: Periodic reviews identify “privilege creep” where users retain rights they no longer require. Technical requirements include:
- Generating comprehensive access reports from the Active Directory or IAM provider.
- Provisioning a formal review task for every asset owner.
- Documenting the “Retain” or “Revoke” decision for 100% of tested accounts.
7. Formalise the Mover Process for Role Changes
Formalise a workflow to recalibrate access rights whenever an employee changes roles within the organisation: This ensures that legacy permissions are removed and new technical rights are provisioned correctly. Key actions involve:
- Triggering a full access review whenever an IAM role change is detected.
- Revoke access to systems that are no longer relevant to the new position.
- Updating the Asset Register to reflect new technical responsibilities.
8. Revoke Access Rights Immediately Upon Termination
Revoke 100% of physical and logical access rights on or before the final day of employment: Leaving accounts active after termination is a major non-conformity. Implementation steps involve:
- Automating account disabling via a central Identity Provider (IdP).
- Revoke access to external cloud services and third-party partner portals.
- Auditing the leaver log to verify that technical revocation was successful.
9. Formalise Privileged Access Management (PAM)
Provision specific technical controls for accounts with elevated permissions, such as Domain Admins or Superusers: Privileged accounts carry the highest risk to the ISMS. Necessary actions include:
- Implementing “Just-In-Time” (JIT) access to reduce the duration of active admin rights.
- Logging and auditing 100% of privileged command executions.
- Ensuring admin tasks are performed from dedicated, secure workstations.
10. Audit Technical Logs for Unauthorised Attempts
Audit system logs daily to identify and investigate failed login attempts or unauthorised access to sensitive data: This provides the “Detective” control required to satisfy Annex A 8.15. Technical actions include:
- Configuring automated alerts for anomalous login patterns or locations.
- Documenting the investigation results of any triggered security alerts.
- Maintaining tamper-proof logs as objective evidence for the ISO 27001 audit.
User access management FAQ
What is User Access Management in ISO 27001?
User Access Management (UAM) is the technical and administrative process of managing user identities and their access rights to organisational information assets. Under ISO 27001:2022 Control 5.18, 100% of user access must be authorised, documented, and reviewed periodically to maintain confidentiality and prevent unauthorised data exposure.
How often should user access reviews be performed?
ISO 27001 mandates that user access rights be reviewed at planned intervals or when significant changes occur. Industry best practice for high-risk systems is a quarterly review (every 90 days), while lower-risk organisational systems are typically audited every 6 to 12 months to ensure 100% accuracy of the user registry.
What are the mandatory components of a compliant access management process?
A compliant UAM process requires a formal technical lifecycle that covers provisioning, authorisation, and timely revocation of credentials. To satisfy auditor requirements, organisations must implement the following technical measures:
- Authorisation: Documented approval from the asset owner for 100% of new access requests.
- Authentication: Enforcing Multi-Factor Authentication (MFA) for all remote and privileged administrative logins.
- Least Privilege: Restricting access rights to the minimum necessary for a specific job function.
- Revocation: Immediate disabling of accounts for leavers to prevent “orphan account” security risks.
What is the business benefit of implementing User Access Management?
Implementing robust UAM reduces the risk of insider threats and external data breaches by approximately 60%. By enforcing granular controls and 100% account accountability, organisations minimise their potential “blast radius” during a security incident and provide citable evidence of due diligence to stakeholders and UKAS auditors.
Related ISO 27001 controls
| Related ISO 27001 Control / Concept | Relationship Description |
|---|---|
| ISO 27001 Annex A 8.2: Privileged Access Rights | Specific Management: A key part of the access management process that focuses on the higher-risk “admin” or privileged accounts, requiring stricter controls and more frequent reviews. |
| ISO 27001 Annex A 8.3: Information Access Restriction | Enforcement: The technical application of the decisions made during the user access management process, restricting access to specific information and systems. |
| ISO 27001 Annex A 8.5: Secure Authentication | Identity Verification: Complements access management by ensuring that the user requesting access is truly who they claim to be through passwords, MFA, or other secure methods. |
| ISO 27001 Annex A 5.15: Access Control | Policy Baseline: Defines the overarching rules and business requirements for access, which the user access management process then executes. |
| Glossary: Least Privilege | Core Principle: The fundamental rule of access management, stating that users should only be given the minimum level of access required to perform their job duties. |
| Glossary: Privilege Creep | Risk Mitigation: Regular reviews within the access management lifecycle are designed specifically to prevent the accumulation of unnecessary permissions over time. |
| Glossary: Identity Management | Process Foundation: The broader discipline that includes user access management, dealing with the lifecycle of digital identities and their associated rights. |
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