MitM (Man-in-the-Middle) is a cybersecurity attack where a third party secretly intercepts and possibly alters the communication between two parties without their knowledge. The attacker can eavesdrop on sensitive data, such as passwords or financial details, or manipulate the information being exchanged. This type of attack often targets unsecured networks or exploits vulnerabilities in websites and applications, putting personal and organizational data at risk. Using encryption protocols and secure connections helps protect against MitM attacks.