Synthient Credential Stuffing Threat Data
CriticalAn aggregation of 2 billion credentials by Synthient highlights the risks posed by credential-stuffing attacks.
- Records exposed
- 1,957,476,021 records
- Breach date
- Breach Apr 11, 2025
- Last update
- Updated Nov 8, 2025
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 2025, the threat-intelligence organization Synthient compiled and analyzed over two billion email addresses along with approximately 1.3 billion unique passwords, which were exposed in earlier breaches and aggregated into credential-stuffing lists by malicious parties. This collection, made publicly searchable in collaboration with Have I Been Pwned (HIBP), helps raise awareness about cybersecurity risks and aids individuals in assessing their exposure to potential account vulnerabilities.
Impact Analysis
Understanding the scope and consequences of this breach.
- User Impact
- Individuals may face risks related to account compromise due to reused or insecure credentials.
- Business Impact
- Increased potential for fraudulent account access across platforms.
- Affected Sectors
- General Public
- Online Services
- Geographic Impact
- Global
What You Should Do
Recommended actions to take in response to this breach.
If You Were Affected
- •Use HIBP or other breach-notification services to verify exposure.
- •Change affected passwords immediately on all accounts.
- •Avoid password reuse and implement strong, unique passwords for each account.
Preventive Measures
- •Implement multi-factor authentication (MFA) on all services.
- •Consider using a password manager for secure password generation and storage.
- •Review and monitor accounts regularly for unauthorized access activities.
Frequently Asked Questions
Common questions about this breach and what it means for you.