If you have forgotten your own WiFi password or need to manage a network, there are safe, legal ways to do it:
Programs that installed intrusive toolbars and pop-ups on your computer.
Most routers now use WPA2 or the newer WPA3. These standards are significantly more secure than the protocols available a decade ago.
What are you currently using (Windows, Mac, etc.)? Do you have physical access to the router?
Turning your computer into a "zombie" used by hackers to launch attacks on other websites. Better Alternatives for WiFi Management