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The ATT&CK Segmentation Layer Is Now Updated to v19.1

The mapping stayed stable. The lesson did not get smaller.

The microsegment.io MITRE ATT&CK Network Segmentation Navigator layer has been refreshed to ATT&CK v19.1. The mappings stayed stable, and that stability says something useful about reachability, lateral movement, and containment.

Posted by Alexander Goller on Friday, July 10, 2026

What Good L3/L4 Policy Can Actually Do

A 2026 reassessment of MITRE ATT&CK, network segmentation, and practical microsegmentation

MITRE ATT&CK maps network segmentation to dozens of adversary techniques. This article reassesses what disciplined L3/L4 policy and microsegmentation can realistically do, where they help most, and where they stop.

Posted by Alexander Goller on Thursday, July 9, 2026