Isaca Updated CISM Exam Questions and Answers by ignacy

The best way to reduce the risk of disruption from an emergency system change is to confirm rollback plans are in place. According to the CISM Review Manual, having an effective rollback (or backout) plan ensures that if the emergency change causes unexpected issues, the organization can quickly revert to a known, stable state. This minimizes downtime and impact to business operations. Approval and communication are important, but only a rollback plan directly addresses risk reduction during unexpected disruptions.

SIEM systems collect and analyze log data from across the organization, allowing for real-time monitoring, incident correlation, and end-to-end tracking of response activities — including severity classification and closure.

“SIEM tools enable centralized management, prioritization, and documentation of incidents, making them essential for impact tracking and incident lifecycle management.”

— CISM Review Manual 15th Edition, Chapter 4: Incident Management Systems*

While EDR and XDR help detect threats, SIEMs offer the full scope for impact-based tracking.

Incident classification helps determine severity, which allows security teams to prioritize recovery efforts. This ensures critical business functions are restored first.

"Incident classification is essential for establishing severity levels and response priorities."

— CISM Review Manual 15th Edition, Chapter 4: Incident Response Lifecycle, Section: Incident Classification*

Reporting and documentation are important, but prioritized recovery is the greatest business-impact-driven benefit.