250k Uhq.txt May 2026

"250K UHQ.txt" is a common file name for stolen credential databases, often marketed by data brokers as "Ultra High Quality" to signify fresh, actionable data for credential stuffing attacks. Containing approximately 250,000 lines of username and password pairs, these files pose a significant risk to user accounts, necessitating the use of security services like Have I Been Pwned to check for exposure. Who's Been Pwned