PCI DSS 10.4.1: Review Security Event Logs Daily
PCI DSS 10.4.1 requires your organization to review security events and cardholder data environment (CDE) system component logs at least once daily. This foundational control helps detect breaches, unauthorized access, and suspicious activity before they escalate. Without daily log review processes, you risk missing critical security incidents that could compromise payment card data.
What this means
This control mandates a systematic daily review of all security events and logs generated by systems within your CDE. Daily review ensures timely detection of anomalies, unauthorized access attempts, policy violations, and system failures that could indicate a security incident. The scope includes logs from all CDE components—servers, databases, firewalls, access points, and monitoring tools—consolidated into a centralized location for efficient analysis.
How to comply
- 1.Establish a centralized log aggregation system that collects security events from all CDE components in real-time or near-real-time
- 2.Define clear daily log review procedures specifying who is responsible, when reviews occur, and which log sources must be analyzed
- 3.Document a consistent review methodology that identifies anomalies, failed login attempts, privilege escalations, data access changes, and system errors
- 4.Create and maintain a log review checklist or template to ensure consistent evaluation of key event categories each day
- 5.Assign ownership of the daily review process to qualified personnel with authority to investigate suspicious activity
- 6.Establish escalation procedures for alerts requiring immediate investigation or incident response
- 7.Retain evidence of daily log reviews in audit logs, review forms, or monitoring system records for at least one year
Evidence auditors look for
- Daily log review checklists signed off by assigned personnel with dates and times
- Centralized SIEM (Security Information and Event Management) dashboard screenshots showing daily monitoring and log ingestion
- Documented incident investigation records triggered by daily log reviews
- Access logs showing authentication attempts, successful logins, and failed access to CDE systems
- System event logs capturing configuration changes, privilege changes, and administrative actions
- Firewall and network logs documenting allowed and denied connections to/from CDE
- Database logs recording user access, data modifications, and queries executed on cardholder data
- Email or ticket system records confirming daily review completion and any alerts generated
- Monitoring tool reports (SIEM, intrusion detection, vulnerability scanner) configured with daily reports
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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