Toronto District School Board (TDSB)

Toronto District School Board (TDSB)

Data Breach on September 02, 2024
Data Breach Report
Victimtdsb.on.ca
Claimed ByLockBit
Date DiscoveredSep 02, 2024
DescriptionToronto District School Board (TDSB) is the largest school board in Canada, overseeing public education in Toronto.
Leak SizeUnknown

Credential Exposure for tdsb.on.ca

We've indexed 59,306 @tdsb.on.ca accounts from external breaches, plus 8,806 credentials for tdsb.on.ca itself.

Last checked Aug 31, 2026

@tdsb.on.ca addresses from external breaches
Third-party breaches49,411 accounts · across 499 breaches · 44,900 with a plaintext password · most recent Jun 9, 2026
Combo lists26,737 accounts · most recent Aug 30, 2026
Phishing pages1 accounts · most recent Jul 24, 2026
Passwords for tdsb.on.ca accounts
Combo lists8,558 logins · most recent Aug 30, 2026
Infostealer logs2,147 logins · 1,361 infected devices · most recent Aug 31, 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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