HIGH SEVERITY

China Software Developer Network Data Breach

Verified by ObscureIQ Intelligence
Xinf@

7.0Severity
6.4MRecords
3Data Fields
2011Year

Impact & Downstream Threats

This breach carries high risk due to the nature of exposed data fields and the scale of affected records.

Primary downstream threats:
  • Credential stuffing against reused passwords across other platforms
  • Targeted phishing campaigns using exposed email addresses

Breach Intelligence

EntityChina Software Developer Network
OrganizationPrivate Company • China
Breach DateDecember 2011
DisclosureNovember 2025
Records Exposed~6.4M
Attack VectorMisconfiguration
SourceHave I Been Pwned / ObscureIQ intelligence
StatusConfirmed

Executive Summary

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.

About China Software Developer Network

Chinese developer community and technology content platform.

Private CompanyChinacsdn.net

Data Points Exposed

Verified fields in the released dataset:
Email addresses
Passwords
Usernames

Dark Web Verification

Status: Confirmed

  • Dataset containing approximately 6.4M records identified in breach intelligence sources.
  • The data is indexed and searchable across breach notification platforms.

Recommended Actions

⚠️ Do not assume this is low sensitivity.

Change Passwords
Change your China Software Developer Network password immediately and any account sharing similar credentials.
Expect Targeted Phishing
Watch for emails referencing this breach. Verify communications through official channels.
Secure Email & Enable MFA
Email compromise is often the first pivot point. Enable multi-factor authentication.
Monitor Financial Accounts
Watch for unauthorized credit applications and suspicious activity.
Check Your Exposure
ObscureIQ clients: this breach is indexed in your profile.
Non-clients may request a breach impact review.

Frequently Asked Questions

What happened in the China Software Developer Network data breach?▾

In December 2011, China Software Developer Network experienced a data breach that exposed approximately 6.4M records containing personal information.

What data was exposed?▾

The exposed data includes fields such as email address, password, username.

How many records were affected?▾

Approximately 6.4M records were affected based on current breach intelligence.

Protect Yourself

Check If You’re Affected

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Request Consultation

ObscureIQ Advisory

We combine proprietary dark web access with commercial and restricted breach intelligence to verify exposure and assess real-world risk.

If you are:
  • A public-facing individual
  • A high-profile executive
  • A customer of China Software Developer Network
  • Or concerned about credential reuse
Services
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Contact
Phone(855) 763-7273Emailinfo@obscureiq.com

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Classification Tags

MisconfigurationEmailPasswords

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