University of Missouri System

University of Missouri System

Data Breach on June 19, 2023
Data Breach Report
Victimumsystem.edu
Claimed ByCL0P
Date DiscoveredJun 19, 2023
DescriptionThe University of Missouri System provides teaching, research, service, and economic development to the state.
Leak SizeUnknown

Credential Exposure for umsystem.edu

We've indexed 2,102 @umsystem.edu accounts from external breaches, plus 2,850 credentials for umsystem.edu itself.

Last checked Oct 4, 2026

@umsystem.edu addresses from external breaches
Combo lists1,326 accounts · most recent Oct 4, 2026
Third-party breaches964 accounts · across 183 breaches · 904 with a plaintext password · most recent Jan 25, 2026
Passwords for umsystem.edu accounts
Combo lists2,726 logins · most recent Oct 4, 2026
Infostealer logs414 logins · 277 infected devices · most recent Oct 1, 2026

Logins may belong to customers or to staff, and the data doesn't say which. None of this is necessarily connected to the ransomware attack above.

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