Tailscale: Subnet router CIDR exposure inventory

Identifies every device currently advertising or enabling subnet routes (bridging non-tailnet networks into the tailnet). Excludes pure exit-node advertisements so only true subnet exposure is surfaced.

Detection logic

Detection requirements

Platform: ESXi IaaS Linux macOS Network Devices Windows
The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.
Log source product: tailscaleccf
Log source service: tailscale_devices_cl

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Detection rules

Tailscale: Subnet router CIDR exposure inventory

Detection logic

Detection requirements

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules