Breach Intelligence

6,875

Total breached databases

In June 2018, the Chinese video-sharing and danmaku (bullet-comment) community AcFun (acfun.cn) allegedly suffered a data breach. AcFun is one of China's earliest anime, comic and game (ACG) streaming communities. Reports suggest approximately 150,000 records from this dump were exposed, including usernames, display nicknames and plaintext passwords.
  • Date: Jun 2018
  • Domain: acfun.cn
  • Country: China
  • Category: Streaming & Entertainment
  • Data: Passwords Names Geographic Locations Usernames
  • Records: 152,788
  • Lines: 152,789
  • Size: 4.57 MB
  • Passwords: Plaintext
Sometime around 2013, gfen.cn (机锋网 / GFan), one of China's largest early Android enthusiast forums and app markets, allegedly suffered a data breach. Reports suggest the DedeCMS-based member database was exposed, affecting approximately 6.7 million users. The compromised data included email addresses, usernames, display names, genders, IP addresses, registration and login timestamps, and passwords stored as MD5 and salted-MD5 hashes.
  • Date: 2013
  • Domain: gfen.cn
  • Country: China
  • Category: Forums & Communities
  • Data: Email Addresses Passwords Names Geographic Locations Usernames Genders IP Addresses Site Activity
  • Records: 7,084,403
  • Lines: 7,084,438
  • Size: 973.97 MB
  • Passwords: MD5, MD5 Salted
  • Cracked: 0%
At an unknown date, a set of credentials for 189.cn — the email and portal service (Tianyi Mail) operated by China Telecom — allegedly appeared in a data leak. Reports suggest approximately 61,000 accounts were exposed, consisting of @189.cn email addresses (based on subscriber phone numbers) paired with plaintext passwords.
  • Domain: 189.cn
  • Country: China
  • Category: Telecommunications
  • Data: Email Addresses Passwords Geographic Locations
  • Records: 61,465
  • Lines: 61,465
  • Size: 1.72 MB
  • Passwords: Plaintext
Sometime around 2011, the official website of DedeCMS (织梦CMS), a widely-used Chinese open-source content management system, allegedly suffered a data breach of its member database. Reports suggest approximately 320,000 user records were exposed, including email addresses, usernames, MD5-hashed passwords, genders, birthdates, QQ/MSN/ICQ contact details, and site activity data.
  • Date: 2011
  • Domain: dedecms.com
  • Country: China
  • Category: Technology
  • Data: Email Addresses Passwords Usernames Genders Site Activity Social Profiles Websites Birthdates
  • Records: 343,764
  • Lines: 343,898
  • Size: 79.12 MB
  • Passwords: MD5
  • Cracked: 0%
In 2013, 51CTO.com, a major Chinese IT technology community and online learning platform, allegedly suffered a data breach. It has been reported that approximately 2.2 million records were exposed, including usernames, email addresses and passwords stored as MD5 hashes (originally salted, with the salt missing from the distributed dump).
  • Date: 2013
  • Domain: 51cto.com
  • Country: China
  • Category: Technology
  • Data: Email Addresses Passwords Usernames
  • Records: 2,154,743
  • Lines: 2,154,749
  • Size: 125.24 MB
  • Passwords: MD5
  • Cracked: 0%
Licaidashiye (licaidashiye.com), a Chinese personal-finance and wealth-management website, allegedly suffered a data breach. Reports suggest that approximately 7,900 individuals were exposed, including email addresses and MD5- and SHA-1-hashed passwords.
  • Data: Email Addresses Passwords
  • Records: 17,832
  • Lines: 17,940
  • Size: 907.97 KB
  • Passwords: MD5, SHA-1
  • Cracked: 0%
Liancaijing (liancaijing.com), a Chinese cryptocurrency and finance news media site, allegedly suffered a data breach. Reports suggest that approximately 214,000 records were exposed, including email addresses and plaintext passwords.
  • Data: Email Addresses Passwords
  • Records: 214,619
  • Lines: 214,619
  • Size: 5.6 MB
  • Passwords: Plaintext

Frequently Asked Questions

A data breach is unauthorized access to data (often involving account takeover, malware, or misconfigured infrastructure). A data leak is exposure of data due to mistakes like public cloud storage, open databases, or accidental publishing. A database dump is a packaged dataset that may come from a breach, leak, scraping, or aggregation.

Change passwords for any affected accounts immediately, prioritizing email, banking, and any account that shares the same password. Enable multi-factor authentication wherever possible. Monitor your accounts for suspicious activity and consider placing a fraud alert or credit freeze if financial data was exposed.

Start with containment and verification: confirm what data was exposed, identify the entry point, rotate credentials (especially SSO, VPN, email), and enforce MFA. Then investigate affected systems, notify stakeholders as required, and harden controls to prevent recurrence. A structured incident response plan helps keep the work measurable and compliant.

Dark web monitoring helps you spot exposure signals early — before stolen data is widely reused for account takeover or targeted attacks. Monitoring complements vulnerability management by revealing when attackers already have leverage. Pair it with continuous attack surface monitoring and strong Asset Discovery to reduce blind spots.

Not always. Some datasets are old, incomplete, or derived from third parties. However, any exposure increases risk because credentials and personal data can be reused indefinitely. Treat it as a priority signal: rotate credentials, enforce MFA, review suspicious logins, and audit the systems that could have produced the data.

SynScan helps you connect the dots between attack surface exposure, vulnerabilities, and breach signals so you can prioritize remediation and reduce the chance of repeat incidents.