Security Vulnerabilities: How Attackers Break in and Spread Through Your Network
Illumio, Thursday, September 17th, 2026
Illumio walks through how vulnerabilities enable initial access and, more damagingly, lateral movement across flat networks.
Illumio explains the lifecycle of a vulnerability-driven breach, separating initial exploitation from the lateral movement that turns an intrusion into a major incident.
The post categorizes common vulnerability classes and shows how flat internal networks let a single compromised host reach critical assets.
It argues that patching alone cannot keep pace with disclosure volume and exploit speed. Segmentation is presented as the control that limits blast radius while patching catches up.