mail.ru Dump
HIGH RISKData breach — September 2014
In September 2014, several large dumps of user accounts appeared on the Russian Bitcoin Security Forum including one with nearly 5M email addresses and passwords, predominantly on the mail.ru domain. Whilst unlikely to be the result of a direct attack against mail.ru, the credentials were confirmed by many as legitimate for other services they had subscribed to. Further data allegedly valid for mail.ru and containing email addresses and plain text passwords was added in January 2018 bringing to total to more than 16M records. The incident was also then flagged as "unverified", a concept that was introduced after the initial data load in 2014.
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What happened in the mail.ru Dump data breach?
In September 2014, several large dumps of user accounts appeared on the Russian Bitcoin Security Forum including one with nearly 5M email addresses and passwords, predominantly on the mail.ru domain. Whilst unlikely to be the result of a direct attack against mail.ru, the credentials were confirmed by many as legitimate for other services they had subscribed to. Further data allegedly valid for mail.ru and containing email addresses and plain text passwords was added in January 2018 bringing to total to more than 16M records. The incident was also then flagged as "unverified", a concept that was introduced after the initial data load in 2014.
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.
Quick answer — was mail.ru Dump hacked?
Yes. mail.ru Dump was breached in September 2014. The breach exposed 16,630,988 records including email addresses, passwords. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the mail.ru Dump breach so dangerous?
The mail.ru Dump breach exposed 16,630,988 records — that is 16.6M people whose personal data is now circulating on the dark web. The combination of email addresses, passwords makes this a high-risk breach that requires immediate action.
Because passwords were exposed, attackers can use credential stuffing to automatically test your mail.ru Dump password against hundreds of other websites. If you reused your password anywhere, those accounts are now at risk. 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 now.
What data was stolen in the mail.ru Dump breach?
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 mail.ru Dump breach still dangerous in 2026?
Yes. Stolen data from the mail.ru Dump breach remains dangerous years after the incident. Research shows that over 65% of stolen credentials from older breaches have never been changed by the account holders. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2014 are still actively used in credential stuffing attacks today.
Personal information like email addresses, phone numbers, and dates of birth never expire. Even if you changed your mail.ru Dump password, the other exposed data can be combined with information from other breaches to target you. Learn more about how long stolen data stays dangerous.
Frequently asked about the mail.ru Dump breach
Approximately 16,630,988 user records were exposed in the mail.ru Dump breach in September 2014.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your mail.ru Dump password elsewhere and haven't changed it, those accounts remain at risk today.
Enter your email in the free checker on EmailLeaked. We scan 12 billion+ breach records including the full mail.ru Dump dataset and tell you instantly whether your email was exposed and what data was taken.
Change your mail.ru Dump password immediately, change any other 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.
Who was affected by the mail.ru Dump breach?
The mail.ru Dump data breach affected approximately 16,630,988 users who had accounts with the service. With 16.6M records exposed, this is one of the larger breaches tracked in our database of 970+ known breaches.
If you ever created an account with mail.ru Dump or used their services, your data may have been included in this breach. Check your email now to find out. You can also read our guide on what to do immediately after a data breach.
If your email was in the mail.ru Dump breach
Change your mail.ru Dump password immediately
Go to mail.ru Dump and change your password right now. Use a strong, unique password that you have never used anywhere else.
Change any account sharing that password
If you used the same password on other sites, change it on every one of them. Attackers test stolen credentials on hundreds of popular sites within hours.
Enable two-factor authentication
Turn on 2FA on mail.ru Dump and every important account. Even if your password is known, attackers cannot get in without the second factor.
Check your other accounts for this breach
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