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Exploit.In

High

Data breach — October 2016

In late 2016, a huge list of email address and password pairs appeared in a "combo list" referred to as "Exploit.In". The list contained 593 million unique email addresses, many with multiple different passwords hacked from various online systems. The list was broadly circulated and used for "credential stuffing", that is attackers employ it in an attempt to identify other online systems where the account owner had reused their password. For detailed background on this incident, read Password reuse, credential stuffing and another billion records in industry-standard breach data sources.

593.4M
Records exposed
2016
Year
2
Data types
Free
To check
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Quick answer — was Exploit.In breached?

Yes. Exploit.In was breached in October 2016, exposing 593,427,119 records including email addresses, passwords. If your email was involved, your data may still be at risk today. Check if you were affected.

What happened in the Exploit.In data breach?

In late 2016, a huge list of email address and password pairs appeared in a "combo list" referred to as "Exploit.In". The list contained 593 million unique email addresses, many with multiple different passwords hacked from various online systems. The list was broadly circulated and used for "credential stuffing", that is attackers employ it in an attempt to identify other online systems where the account owner had reused their password. For detailed background on this incident, read Password reuse, credential stuffing and another billion records in industry-standard breach data sources.

The exposed data included 2 types of personal information. Because passwords were exposed, users who reused their password on other sites are at particular risk. Learn more about what a data breach means for you.

Why was the Exploit.In breach so dangerous?

The Exploit.In breach exposed 593,427,119 records — 593.4M people whose personal data is now circulating in criminal markets.

Because passwords were exposed, attackers can use credential stuffing to automatically test your Exploit.In credentials against hundreds of other websites. Read more about what happens to your data after a breach.

Don't wait to find out — check if your email was exposed in this breach.

What data was stolen in the Exploit.In breach?

Email addresses Passwords

Email addresses — used for phishing attacks and credential stuffing against your other accounts

Passwords — can be used to access your accounts directly or cracked to reveal your actual password

Is the Exploit.In breach still dangerous in 2026?

Yes. Stolen data from the Exploit.In breach remains dangerous years after the incident. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2016 are still actively used in automated attacks today.

Personal information like email addresses, phone numbers, and dates of birth does not expire. Even if you changed your Exploit.In password, the other exposed data can be combined with information from other breaches to target you. Learn how long stolen data stays dangerous.

What to do if your email was in the Exploit.In breach

1

Change your Exploit.In password immediately

Log into Exploit.In and change your password to something strong and unique — one you have never used anywhere else.

2

Change any account sharing that password

If you reused this password elsewhere, change it on every affected account. Attackers test stolen credentials against hundreds of popular sites within hours.

3

Enable two-factor authentication

Turn on 2FA on Exploit.In and every important account. Even if your password is known, attackers cannot access the account without the second factor.

4

Check your other accounts for this breach

Run a full email scan to see every breach your address appears in — not just this one.

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Frequently asked about the Exploit.In breach

How many people were affected by the Exploit.In data breach?
Approximately 593,427,119 user records were exposed in the Exploit.In breach in October 2016.
Is the Exploit.In breach still a risk in 2026?
Yes. Leaked credentials are actively used in credential-stuffing attacks years after a breach. If you reused your Exploit.In password elsewhere and have not changed it, those accounts remain at risk today.
How do I check if my email was in the Exploit.In breach?
Enter your email in the free checker on EmailLeaked. We scan millions of breach records including the Exploit.In dataset and tell you instantly whether your email was exposed and what data was taken.
What should I do if I was in the Exploit.In breach?
Change your Exploit.In password immediately, update any account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.

How this breach page is reviewed

Breach pages are built from structured breach records and reviewed for practical risk guidance by EmailLeaked. Risk labels reflect exposed data types and are intended to help readers prioritise action.

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