Upper Darby School District

Upper Darby School District

Data Breach on June 21, 2024
Data Breach Report
Victimupperdarbysd.org
Claimed ByINC_RANSOM
Date DiscoveredJun 21, 2024
DescriptionUpper Darby School District is a large public school district of approximately 12,000 students in Upper Darby Township, Delaware County, Pennsylvania.
Leak Size500GB

Credential Exposure for upperdarbysd.org

We've indexed 1,988 @upperdarbysd.org accounts from external breaches, plus 34 credentials for upperdarbysd.org itself.

Last checked Sep 27, 2026

@upperdarbysd.org addresses from external breaches
Third-party breaches1,480 accounts · across 137 breaches · 1,028 with a plaintext password · most recent Feb 7, 2026
Combo lists741 accounts · most recent Sep 25, 2026
Passwords for upperdarbysd.org accounts
Combo lists33 logins · most recent Sep 23, 2026
Infostealer logs5 logins · 6 infected devices · most recent Jul 19, 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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