MediumBreachHave I Been Pwned — public breach catalog· 27 Nov 2025
China Software Developer Network — 6.4M accounts
Severity: Medium · Kind: Data breach
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From the source
In 2011, the China Software Developer Network (CSDN) suffered a data breach that exposed over 6M user records . The data included email addresses alongside usernames and plain text passwords.
Breach facts
- Accounts affected
- 6,414,990
- Verified
- Yes
- Sensitive
- No
- Domain
- csdn.net
- Data exposed
- Email addressesPasswordsUsernames
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