Tailscale: Devices with outdated client version

Identifies tailnet devices that report UpdateAvailable=true on the latest snapshot. Tailscale releases security updates regularly; outdated clients lack the most recent improvements.

Detection logic

Detection requirements

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

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Detection rules

Tailscale: Devices with outdated client version

Detection logic

Detection requirements

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules