The big problem is that people who do bad things on the internet use something called credential stuffing attacks. This is when they try to log in to lots of websites using usernames and passwords that they got from somewhere else. They do this because lots of people use the password for lots of different things. So even if the bad people got the passwords a time ago they can still use them to get into accounts. If people did not change their passwords after the bad people got them then their accounts are still not safe today. Credential stuffing attacks are a deal because of this. Credential stuffing attacks can get into accounts if the passwords are not changed.
Recently people who keep an eye on these things have noticed that there has been a lot credential stuffing going on towards the end of the year. The people who study this stuff saw an increase in automated attempts to log in to virtual private network platforms. Some of these platforms were seeing millions of attempts to authenticate over short periods of time. Credential stuffing attacks, like these use computers to try a lot of things quickly rather than trying to find new ways to exploit software vulnerabilities. This just goes to show that credential stuffing can be very effective because it only needs a list of credentials that have been compromised to get around the security defenses of private network platforms and credential stuffing is a big problem.
The thing about this threat is that it just will not go away. We know this because the police found hundreds of millions of stolen passwords on devices that belonged to one person. People in charge of security say that this shows how long passwords can be used by people after they have been stolen. When passwords get out they often get passed from one person to another which means they can still be used for a time after they were first stolen. This is the case, with stolen passwords.
Password reuse is a problem. People use the password for lots of things like their personal stuff, work and bank accounts.
This is not an idea because if someone gets into one of your accounts they can get into all of them. That means they can do a lot of damage like steal your money use your identity or get your information. Password reuse is a risk factor and it makes it easy for bad people to take over all of your accounts.
Security professionals say that when you take action to defend yourself is very important. If you wait until something bad happens or your account is compromised it can cause a lot of damage. You should take steps before anything bad happens.
For example you should check the databases that list breached information to see if your credentials are exposed. This is an important thing to do to stay safe. If you can you should stop using passwords and start using stronger ways to authenticate, like passkeys. Security professionals think that passkeys are a safer way to do things and they can really reduce the risk of something bad happening to your Security. Checking for exposed credentials and using passkeys are ways to defend yourself and stay safe from people who might try to hurt you or your Security.
When we talk about accounts that still use passwords experts say we should use password managers.
These managers help us create and store passwords for each service. This way if someone gets one of our passwords they cannot use it to get into our accounts. Password managers make sure we have strong passwords for each service so if one password is leaked it does not affect our other accounts.
Experts, like password managers because they help keep our accounts safe by making sure each one has a password.
The scale of the 16 billion credential leak serves as a reminder that cybersecurity incidents do not end when headlines fade. Compromised passwords retain their threat value for months or even years, and ongoing vigilance remains essential.
As attackers continue to exploit old data in new ways, timely action by users remains one of the most effective defenses against account takeover and identity-related cybercrime.
