The Zephyr project supports the following versions with security updates:
- The most recent release, and the release prior to that.
 - Active LTS releases.
 
At this time, with the latest release of v4.0, the supported versions are:
- v4.1: Current release
 - v4.0: Prior release
 - v3.7: Current LTS
 
Please see our Security Vulnerability Reporting page for details on the process.