Stop Using These 5 Passwords Before You Get Hacked

The Breach You Haven’t Noticed Yet

There’s a decent chance your password is already floating around on the dark web right now. Not because you’re careless, necessarily but because the way most people think about passwords is about twenty years behind the people who are trying to steal from them.

Every year, security researchers publish “most common password” lists that read like a collective admission of defeat. “123456” has held the top spot for so long it’s practically a tradition. And every year, millions of people scroll past those headlines, reassure themselves they’re not that dumb, and keep logging in with the name of their dog and a lucky number. The gap between what we know we should do and what we actually do is exactly where hackers live.

This isn’t a lecture about creating a32-character alphanumeric string. It’s about five specific types of passwords that make you an easy target and why they feel safe even when they’re completely exposed.

Your Name Plus a Number

John1985. Sarah2023. Mike99. These feel personal because they are personal. That’s exactly the problem.

When hackers run what’s called a credential stuffing attack, they’re not sitting at a keyboard guessing one by one. They’re running automated tools that cycle through billions of combinations in minutes. Those tools are specifically trained on human psychology. First name plus birth year is one of the first patterns they try, because it’s one of the most common things people actually do.

The logic makes sense from a memory standpoint. You want something you won’t forget. But the things you won’t forget your name, your birthday, the year you graduated are also the things that show up in your social media profiles, your email signature, your LinkedIn. An attacker doesn’t need to guess. They just need to look.

Even if you’ve never been in a data breach, this type of password is dangerous because it’s predictable by design.

The Word You Swapped Letters In

P@ssw0rd. S3cur1ty. L0g1n. The “clever” substitutions that feel like a workaround but are really just a well-known pattern with a thin disguise.

Password cracking dictionaries the lists that cracking software uses to brute-force accounts have included leet-speak substitutions for over a decade. @ for a, 0 for o, 3 for e. It’s not a secret code. It’s a recognized pattern that any serious cracking tool handles in its first pass.

The origin of this habit is actually well-intentioned. Years ago, websites started requiring “special characters,” and people adapted by swapping letters for symbols that looked similar. The requirement got met. The security didn’t improve. Now we have an entire generation of people who think P@ssword1 is meaningfully stronger than password1, when in practice it adds maybe a few seconds to a cracking attempt.

If your strategy for making a password stronger is to make it look like a password while secretly not being one, that strategy has already been accounted for.

The Name of Something You Love

Fluffy. Harley. Broncos2021. These feel private. In a way, they are private but they’re also findable.

This category is what security professionals call “personally identifiable” passwords. They’re rooted in things that matter to you: your pet, your team, your car, your hometown. And for most people, those details are scattered across years of social media posts, forum comments, public profiles. A targeted attacker someone who actually has you in their sights doesn’t need to crack your password. They just need to spend ten minutes on your Facebook page.

But even untargeted attackers benefit from this pattern. Animals names, sports teams, and city names are heavily weighted in password dictionaries because they’re statistically common choices. “Fluffy” as a password has been cracked so many times it barely registers as a challenge.

The deeper issue here is that we tend to pick passwords from the same emotional pool we draw everything else from the things we love, the things we remember. That’s human. It’s also exactly as predictable as it sounds.

The One Password You Use Everywhere

This one isn’t a type of password. It’s a habit. And it might be the most dangerous entry on this list.

Using the same password across multiple accounts takes one breach and turns it into many. When a site you signed up for in 2018 gets hacked and thousands of sites do get hacked every year, most of them without making major news your email and password combination goes into a database. Attackers then try that same combination on Gmail, on your bank, on Amazon, on PayPal. This is credential stuffing at scale, and it works because password reuse is epidemic.

The numbers are bleak. Studies consistently show that somewhere between 50 and 65 percent of people reuse passwords across multiple accounts. Some security researchers put the number even higher when you account for minor variations like adding a “1” to the end of a familiar password.

You might be thinking: but surely the important accounts have extra protections. Some do. But not all of them. And the attacker doesn’t need your bank password if they can get into your email first because from there, they can reset everything else.

Password reuse isn’t a shortcut. It’s a single point of failure for your entire digital life.

The Default One You Never Changed

Admin. Password. Welcome1. These are the passwords that came with something a router, a company account, a new subscription and never got updated.

Default passwords are a well-documented vulnerability and yet they persist at a staggering scale. Security researchers regularly discover routers, smart home devices, and enterprise systems still running on factory credentials. The reason is mundane: changing a default password is a step that feels optional. The device works. The account works. So you log in, do what you needed to do, and never go back.

What makes default passwords particularly dangerous is that they’re public knowledge. Router manufacturers publish their default credentials in support documentation. Lists of common defaults circulate freely. Anyone scanning networks or testing accounts already has a shortlist of exactly what to try.

There’s also the workplace dimension. If you’ve ever started a new job and never changed the initial password IT gave you, that credential is probably known to at least a handful of people who no longer work there, plus whoever set it up in the first place.

What Actually Works Instead

The honest answer is: a password manager, combined with two-factor authentication, makes most of this conversation irrelevant. A password manager generates long, random, unique passwords for every account and remembers them for you. Two-factor authentication means that even if a password is stolen, an attacker still can’t get in without a second form of verification.

The psychological barrier to adoption is real. Setting up a password manager takes time. It feels complicated before it feels simple. But that friction is a one-time cost. Getting hacked dealing with a compromised bank account, a stolen identity, months of cleanup is a cost that compounds.

If a password manager feels like a big lift right now, the immediate minimum is this: different passwords for your email, your bank, and anything that contains financial or health information. Those three categories. That alone moves you out of the most exploitable tier.

The passwords on this list aren’t used because people are reckless. They’re used because they’re easy, because they feel like they should be enough, and because nothing bad has happened yet. But “nothing bad has happened yet” is not the same as “nothing bad will happen.” On the internet, those two things have a shorter gap between them than most people realize.