Beyond the Blind Spots: 5 Reasons Your Modern Security Stack Is Still Failing
Trellix, Wednesday, September 30th, 2026
Trellix argues EDR, SASE and ZTNA leave gaps against living-off-the-land attacks and makes the case for active network detection and response.
Trellix describes how an attacker with a single stolen credential can bypass SASE and ZTNA controls and move laterally using native admin tools, leaving EDR and firewalls silent.
It argues standard security stacks rest on assumptions of coverage and trust that fail with unmanaged devices and AI-orchestrated attacks, since EDR can be disabled or blinded and cannot run on IoT, OT or PLC hardware, while network packets cannot be hidden.
The post outlines five shifts behind an active network detection and response approach that treats the network as the source of truth.