---
title: "Data breach at Synthient Credential Stuffing Threat Data"
description: "In April 2025, Synthient Credential Stuffing Threat Data suffered a data breach. 1957 million accounts were affected. The exposed data includes email addresses and passwords."
canonical: https://inyourgeek.com/en/fuites-de-donnees/2025-04-11-synthient-credential-stuffing-threat-data
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2025-11-06
dateModified: 2025-11-06
---
# Synthient Credential Stuffing Threat Data

Data breach — High

In April 2025, Synthient Credential Stuffing Threat Data suffered a data breach. 1957 million accounts were affected. The exposed data includes email addresses and passwords.

| Fact | Value |
| --- | --- |
| Disclosed on | November 6, 2025 |
| Incident dated | April 11, 2025 |
| Accounts affected | 2B |
| Sector | Digital services |
| Country | International or undetermined |
| Cause | Undisclosed |
| Severity | High |
| Status | Confirmed |

## Exposed data

- Email address
- Password (hashed)

## What you can do

- Change that password — and everywhere you reused it. That is how a leak spreads to your other accounts.
- Turn on two-factor authentication on the affected accounts: a stolen password is then no longer enough.
- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.

## Sources

- [Have I Been Pwned — Synthient Credential Stuffing Threat Data](https://haveibeenpwned.com/Breach/SynthientCredentialStuffingThreatData) — Have I Been Pwned (CC BY 4.0)

_Entry built from Have I Been Pwned’s structured data, with no model rewriting._

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