71M accounts from Stealer Logs, Jan 2025 were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
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Email addressesPasswords
In January 2025, stealer logs with 71M email addresses were added to HIBP. Consisting of email address, password and the website the credentials were entered against, this breach marks the launch of a new HIBP feature enabling the retrieval of the specific websites the logs were collected against. The incident also resulted in 106M more passwords being added to the Pwned Passwords service.
Source: Have I Been Pwned (CC BY 4.0)