Synthient Stealer Log Threat Data
What was exposed
Email addressesPasswords
What to do if you were affected
- Change your password for this account, and anywhere you reused it. Turn on two-factor authentication.
- Expect more phishing and spam at this address. Treat messages that reference this company with extra caution.
Details
During 2025, Synthient aggregated billions of records of "threat data" from various internet sources . The data contained 183M unique email addresses alongside the websites they were entered into and the passwords used. After normalising and deduplicating the data, 183 million unique email addresses remained, each linked to the website where the credentials were captured, and the password used. This dataset is now searchable in HIBP by email address, password, domain, and the site on which the credentials were entered.
Frequently asked questions
What is the Synthient Stealer Log Threat Data data breach?
During 2025, Synthient aggregated billions of records of "threat data" from various internet sources . The data contained 183M unique email addresses alongside the websites they were entered into and the passwords used. After normalising and deduplicating the...
When did the data breach happen?
This data breach occurred around April 2025.
How many accounts were affected?
Around 182,962,095 accounts were affected.
What information was exposed?
Exposed data included Email addresses and Passwords.
What should I do if I was affected?
Change your password for this account, and anywhere you reused it. Turn on two-factor authentication. Expect more phishing and spam at this address. Treat messages that reference this company with extra caution.
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