How to Audit ISO 27001 Annex A 8.8

The ultimate audit guide to ISO 27001 Annex A 8.8 Management of Technical Vulnerabilities.

1. Vulnerability Management Policy Formalisation Verified

Verification Criteria: A documented policy exists defining the roles, responsibilities, and timelines for identifying and remediating technical vulnerabilities.

Required Evidence: Approved Vulnerability Management Policy or Patch Management Standard with explicit remediation SLAs (e.g., ‘Critical’ patches within 14 days).

Pass/Fail Test: If the organisation lacks a formalised document specifying timelines for vulnerability remediation, mark as Non-Compliant.

2. Technical Vulnerability Scanning Coverage Confirmed

Verification Criteria: Automated scanning tools are active and cover all assets identified in the master asset register, including on-premise, cloud, and containerised environments.

Required Evidence: Scan configuration reports from tools such as Nessus, Qualys, or Rapid7 showing full IP range or asset tag inclusion.

Pass/Fail Test: If critical production environments or newly provisioned cloud subnets are excluded from the scanning scope, mark as Non-Compliant.

3. Scanning Frequency Alignment Validated

Verification Criteria: Vulnerability scans are performed at a frequency defined by the risk assessment (e.g., weekly or monthly) and after significant system changes.

Required Evidence: Historic scan logs showing consistent execution intervals over the previous 12-month period.

Pass/Fail Test: If the organisation has failed to perform a comprehensive vulnerability scan within the last 90 days, mark as Non-Compliant.

4. Critical Vulnerability Prioritisation Logic Verified

Verification Criteria: A formalised risk-rating mechanism (e.g., CVSS score) is utilised to prioritise remediation efforts based on the severity of the vulnerability.

Required Evidence: Vulnerability reports showing categorisation by severity and an active “Risk Acceptance” log for deferred items.

Pass/Fail Test: If ‘Critical’ vulnerabilities (CVSS 9.0-10.0) are treated with the same urgency as ‘Low’ vulnerabilities, mark as Non-Compliant.

5. Remediation SLA Compliance Confirmed

Verification Criteria: Vulnerabilities are remediated within the timeframes specified in the internal policy, with evidence of closure for identified flaws.

Required Evidence: Comparative report showing “Date Identified” vs “Date Closed” cross-referenced against the policy SLAs.

Pass/Fail Test: If more than 10% of ‘Critical’ or ‘High’ vulnerabilities exceed their remediation deadline without an approved extension, mark as Non-Compliant.

6. Patch Deployment Verification Records Identified

Verification Criteria: Successful deployment of security patches is verified through post-patch rescanning or automated patch management reports.

Required Evidence: Rescan reports showing “Vulnerability Resolved” or “Clean” status following a remediation cycle.

Pass/Fail Test: If the organisation marks vulnerabilities as ‘fixed’ in a tracker without technical verification that the patch successfully applied, mark as Non-Compliant.

7. External Vulnerability Intelligence Integration Verified

Verification Criteria: The organisation utilises external threat intelligence sources (e.g., CISA KEV, NVD) to identify new vulnerabilities relevant to their specific technology stack.

Required Evidence: Subscriptions to vendor security advisories or evidence of CISA/NVD alerts triggering internal assessment tasks.

Pass/Fail Test: If the organisation only reacts to annual audit findings rather than proactive threat advisories, mark as Non-Compliant.

8. Zero-Day Vulnerability Response Plan Validated

Verification Criteria: A documented emergency procedure exists for responding to ‘zero-day’ vulnerabilities that cannot be immediately patched.

Required Evidence: Incident Response Plan containing a specific ‘Emergency Patching’ or ‘Compensating Control’ subsection.

Pass/Fail Test: If there is no process for implementing temporary blocks or WAF rules for unpatchable critical flaws, mark as Non-Compliant.

9. Authorised Software Whitelisting Enforcement Confirmed

Verification Criteria: Technical controls restrict the installation of unauthorised software that could introduce vulnerabilities into the environment.

Required Evidence: MDM/EDR configuration logs showing active software whitelisting or the removal of local administrative rights for standard users.

Pass/Fail Test: If a standard user can install unapproved third-party executable files on their corporate endpoint, mark as Non-Compliant.

10. Management Review of Vulnerability Metrics Recorded

Verification Criteria: Senior management reviews vulnerability metrics (e.g., mean time to remediate, total open vulnerabilities) to ensure resource adequacy.

Required Evidence: Management Review Meeting (MRM) minutes or security dashboard exports presented to leadership within the last 6 months.

Pass/Fail Test: If the ISMS management review fails to include an analysis of the current technical vulnerability posture, mark as Non-Compliant.

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