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Confirmed breach

Synthient Credential Stuffing Threat Data data breach

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A breach of Synthient Credential Stuffing Threat Data was added to Have I Been Pwned’s breach database on 6 November 2025. It affected 1,957,476,021 accounts. Exposed: Passwords and logins and Email addresses. The breach began on 11 April 2025, 209 days before it was reported.

If Synthient Credential Stuffing Threat Data had your data

  1. Look for Synthient Credential Stuffing Threat Data’s own notice or letter: it should say what of yours was involved. Keep it.
  2. Change your Synthient Credential Stuffing Threat Data password, and the same password anywhere else you use it. Turn on two-step sign-in.
  3. Expect scams that use your details: calls, texts or emails pretending to be Synthient Credential Stuffing Threat Data, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.