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zt_net_003 — Subnet has no associated Network Security Group

Summary

Severity: High · Pillar: Network · Chain role: ENABLER

Description

Subnets without an NSG rely entirely on adjacent resource controls; defense-in-depth requires at least one NSG layer on every subnet.

Mapping

Framework Control / Reference
NIST 800-53 SC-7
NIST 800-207 Tenet 5 - Integrity monitored
CIS Azure
MITRE ATT&CK Technique T1021
MITRE ATT&CK Tactic Lateral Movement
Zero-Trust Tenet Tenet 5
Framework tags nist-800-207, argus-zt

Source

Rule defined at policies/azure/zt/network/zt_net_003.rego.

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