Collection #1
CriticalMassive credential data breach exposed 772 million email-password pairs in January 2019.
- Records exposed
- 772,904,991 records
- Breach date
- Breach Jan 7, 2019
- Last update
- Updated Jan 16, 2019
What data was exposed?
Fields reported as compromised in this breach record.
Why does this breach matter?
In-depth analysis of the breach and its implications.
In January 2019, the 'Collection #1' breach revealed over 772 million unique email and password combinations being distributed among credential stuffing lists on hacking forums. These combinations are typically sourced from previous breaches, with an aim to exploit users' reuse of passwords across different platforms. This incident underscores the risks of password reuse and highlights the need for strong, unique authentication practices.
Impact Analysis
Understanding the scope and consequences of this breach.
- User Impact
- Users may face account compromise risks if passwords exposed are reused across platforms.
- Business Impact
- Organizations may face increased threats from credential stuffing efforts targeting their services.
- Affected Sectors
- Information Technology
- Consumer Services
- Geographic Impact
- Global
What You Should Do
Recommended actions to take in response to this breach.
If You Were Affected
- •Change passwords for affected accounts, especially if reused across platforms.
- •Enable two-factor authentication wherever possible.
- •Monitor the account for unauthorized access or anomalies.
Preventive Measures
- •Use unique passwords for each account.
- •Employ a password manager to securely store credentials.
- •Implement multi-factor authentication on sensitive accounts.
Frequently Asked Questions
Common questions about this breach and what it means for you.