1.3B Passwords Exposed Online; Check Your Accounts Now

If you haven’t checked whether your passwords have been exposed lately, now is the time. A staggering 1.3 billion unique passwords and 2 billion unique email addresses have surfaced online, and security experts warn users to act immediately.

A Different Kind of Data Exposure

This leak isn’t tied to a single company breach. Instead, the threat intelligence firm Synthient collected leaked credentials by scanning countless sources across both the open and dark web. The firm, which recently uncovered 183 million leaked email accounts, has now identified the largest credential collection in years.

How Hackers Use These Credential Lists

Most of the exposed data appears in credential-stuffing lists, which combine stolen email addresses and passwords from past breaches. Cybercriminals buy and trade these lists to break into accounts across multiple platforms. This time, however, Synthient founder Benjamin Brundage aggregated several massive lists into one dataset.

Verification With Have I Been Pwned

To verify the accuracy of the credentials, Brundage partnered with cybersecurity expert Troy Hunt, creator of Have I Been Pwned (HIBP).

Hunt first checked one of his own compromised email accounts and confirmed that both the address and several associated passwords were in the new dataset. He then reached out to a mix of HIBP subscribers, some previously breached, some not, to verify the presence of new data. The results confirmed that the collection includes freshly exposed passwords, not only recycled ones.

How the Data Is Being Used Safely

HIBP has added the verified passwords to its Pwned Passwords service. Importantly, the service does not store email addresses, which preserves user privacy and prevents misuse.

How to Check Whether Your Password Was Exposed

Users can securely test their passwords by visiting the Pwned Passwords search tool. The system uses an anonymity model that processes everything locally in the browser, ensuring no password ever leaves the user’s device.

If a password appears in the database, experts advise changing it immediately. While premium password managers can generate strong replacements, free tools from Bitwarden, LastPass and ProtonPass are also available.

Why You Must Avoid Reusing Passwords

Reusing the same email and password across multiple accounts is extremely risky. Once hackers obtain a stolen pair, they automatically test it on other websites, an attack method known as credential stuffing. Due to widespread password reuse, these attacks remain highly effective.

Strengthen Security With 2FA and Antivirus Protection

Creating strong, unique passwords is crucial, but it’s not enough. Security professionals emphasize enabling Two-Factor Authentication (2FA) on all important accounts. Even if hackers have your password, 2FA blocks access without a second verification step.

Additionally, device security is essential. Cybercriminals often use info-stealing malware to capture passwords directly from infected systems. Installing reputable antivirus software on your PC, Mac and Android device significantly reduces this risk.

Passkeys: A Safer Alternative to Passwords

For users seeking the most secure login method, passkeys are gaining popularity. They rely on cryptographic keys instead of text-based passwords, making them immune to phishing, guessing and reuse attacks.

Stay Proactive, Not Reactive

Although many people only change passwords after major breaches, cybersecurity experts stress the importance of acting proactively. Regularly checking for exposed credentials, using unique passwords, enabling 2FA and maintaining device security can significantly reduce hacking risks.