Every public data breach

44 disclosed this week · 26,355 on record

Adpost

Disclosed Oct 7, 20253,339,512 accountsConfirmed

Official notice

In February 2025, data obtained from an earlier Adpost breach surfaced. The dataset contained 3.3M records including email addresses, usernames, and display names. Adpost later published a disclosure notice and advised they'd forced a credential refresh, among other actions.

What is known

People affected3,339,512 (accounts in the leaked data, per Have I Been Pwned)
DisclosedOct 7, 2025
HappenedFeb 14, 2025
AttackNot stated
Data exposedEmailsNames
SectorTech
StatusConfirmed
Check your emailHave I Been Pwned

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (Have I Been Pwned), confirmed by Company page. Record counts are as reported. Not legal advice.

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