Improper host key checking in active check Check SFTP Service and special agent VNX quotas and filesystem in Checkmk before Checkmk 2.3.0p15, 2.2.0p33, 2.1.0p48 and 2.0.0 (EOL) allows man-in-the-middle attackers to intercept traffic
The product performs a key exchange with an actor without verifying the identity of that actor.