Why EDR and XDR are not enough: The case for Zero Trust

This report contends that detection-centric EDR/XDR cannot reliably stop fast, stealthy attacks—particularly those using LOTL, fileless malware, process injection, and credential abuse—and advocates a Zero Trust strategy with application allowlisting, Ringfencing, just-in-time elevation, and network/storage controls to prevent execution and lateral movement, while retaining detection for validation, investigation, and forensics.