 What is the most used password in the world? Believe it or not, 123456 is the most used password in the world. NordPass released a list of the most common passwords of 2020. Over 2.5 million users decided to use the password 123456. Unsurprisingly, that's a weak password that nobody should ever use. It was cracked a million times in 2020. Packers can crack the password in less than a second due to its sequential and common nature. And now you know.