Metasploit is a open-source tool and is the world's most used penetration testing framework for finding security issues.
Use this tool only on systems you own or have explicit permission to test.
The Metasploit Framework is a Ruby-based, modular penetration testing platform that enables you to write, test, and execute exploit code. The Metasploit Framework contains a suite of tools that you can use to test security vulnerabilities, enumerate networks, execute attacks, and evade detection.
At its core, the Metasploit Framework is a collection of commonly used tools that provide a complete environment for penetration testing and exploit development.