Why “123456” stays near the top
The familiar answer is 123456: a short, ascending number sequence that is easy to type and easy to remember. That convenience is exactly what makes it a poor secret. Attackers do not need to guess every possible combination in order; automated tools try predictable choices like this early.
One weak password can unlock more than one account
The danger grows when people reuse the same password. If criminals obtain a password from one breached service, they may try it on email, shopping, or banking accounts. This tactic, called credential stuffing, relies on the fact that a password exposed in one place may still work somewhere else.
A familiar sequence can also be vulnerable to guessing attempts against an individual account. Services can slow those attempts with limits and extra checks, but those defenses do not make a widely known password a safe choice—especially if it has already appeared in a data leak.
Make the password hard to guess, not hard to manage
A long, unique password for each account gives attackers less to reuse and more to guess. A password manager can create and store those passwords so a person does not have to memorize them all. Where available, passkeys offer another option: they let a device prove account access without asking the user to type a reusable password.
The practical lesson behind the six digits is simple: a password that is effortless to remember may also be effortless for an automated tool to try.
