Synthient Stealer Log Threat Data data breach
182,962,095 accounts exposed.
Check whether your email is included on Have I Been Pwned.
What was exposed
Email addressesPasswords
What to do
- Change your Synthient Stealer Log Threat Data password, and the password on any other site where you used the same one.
- Expect more phishing emails that mention this service. Do not click links in them; go to the site directly.
- Turn on two-step verification wherever it is offered, and use a password manager.
About this 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 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.