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Yandex Dump Data Breach

Understand what this public breach record reports and choose next steps based on the information involved.

Breach date: September 7, 20141,186,564 affected accounts in the record
01

What happened?

In September 2014, news broke of a massive leak of accounts from Yandex , the Russian search engine giants who also provides email services. The purported million "breached" accounts were disclosed at the same time as nearly 5M mail.ru accounts with both companies claiming the credentials were acquired via phishing scams rather than being obtained as a result of direct attacks against their services.

02

When did it happen?

The breach date in the public record is September 7, 2014. The record was added to the catalogue on September 12, 2014 and last updated there on September 12, 2014.

03

What information was reported as exposed?

  • Email addresses
  • Passwords

These are incident-level categories. The record does not prove that every category was exposed for every affected person.

04

Who may be affected?

This record may be relevant to people who had an account or other relationship with Yandex Dump or used forum.btcsec.com around September 7, 2014. A catalogue entry does not establish that every customer was affected or that every listed data category applied to each person. Compare the record with an official notice addressed to you.

05

What should you do?

Verify whether the notice applies to you

Compare the organization, dates, and information categories with any notice you received. Use contact details you independently confirm.

Secure affected accounts

Change exposed or reused passwords, begin with your email account, and turn on multi-factor authentication where available.

Expect targeted phishing

Treat unexpected breach follow-ups with caution. Do not use links or phone numbers in a suspicious message; contact the organization directly.

Choose actions that match the information involved. If you find signs that someone is using your identity, the Federal Trade Commission provides a personal recovery plan at IdentityTheft.gov.

Sources and review information

Page reviewed September 14, 2026 by the Data Breach Help Editorial Team. Catalogue details reflect the provider record and may change.