A breach of China Software Developer Network was added to Have I Been Pwned’s breach database on 27 November 2025. It affected 6,414,990 accounts. Exposed: Passwords and logins, Email addresses and Usernames. The breach began on 21 December 2011, 5,090 days before it was reported.
Status
Confirmed breach
People affected
6,414,990 accounts
Reported
27 November 2025
Breach began
21 December 2011
Time to tell
5,090 days (the median in California’s notices over the last year: 154 days)
Look for China Software Developer Network’s own notice or letter: it should say what of yours was involved. Keep it.
Change your China Software Developer Network password, and the same password anywhere else you use it. Turn on two-step sign-in.
Expect scams that use your details: calls, texts or emails pretending to be China Software Developer Network, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.
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