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China Software Developer Network

Have I Been PwnedConfirmed breachAdded November 27, 2025Occurred December 21, 20116,414,990 accountscsdn.netAll China Software Developer Network breaches →
What was exposed
Email addressesPasswordsUsernames
What to do if you were affected
Details
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.
Frequently asked questions

What is the China Software Developer Network data breach?

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.

When did the data breach happen?

This data breach occurred around December 2011.

How many accounts were affected?

Around 6,414,990 accounts were affected.

What information was exposed?

Exposed data included Email addresses, Passwords and Usernames.

What should I do if I was affected?

Change your password for this account, and anywhere you reused it. Turn on two-factor authentication. Expect more phishing and spam at this address. Treat messages that reference this company with extra caution. Be wary of targeted scams that use your personal details to sound convincing.

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