The 2011 Tianya Data Breach: What Happened and What Was Exposed?

In December 2011, Tianya — once the biggest online forum in China — suffered a major data breach that exposed the personal details of over 31 million users. Threat actors managed to infiltrate Tianya's systems and extracted sensitive information, including usernames, email addresses, and passwords. Given the forum's massive popularity at the time, this breach quickly became one of the most significant exposures of user data in China’s online history, impacting millions who used Tianya to discuss news, culture, entertainment, and a wide range of social topics.

What Data Was Compromised?

The breach revealed three key types of user data:

• Usernames
• Passwords
• Email Addresses

This combination of personal details put affected users at risk of not just unwanted exposure, but potential account takeovers on other sites where password reuse occurred. The scope of information obtained meant that anyone with access to the leaked data could see account and contact details for a massive cross-section of Tianya's user base.

How Many Users Were Affected?

The intrusion led to the exposure of approximately 31,227,261 user records. With Tianya’s status as a major social platform, users from a wide range of backgrounds were swept up in the breach.

Timeline: When Did the Tianya Breach Occur?

The security incident took place in December 2011. This period was a height of activity for Tianya as an online community, and the loss of data quickly became a hot topic among Chinese internet users. Details about the breach began to circulate soon after, drawing attention both within China and among international cybersecurity analysts tracking major exposures.

Frequently Asked Questions (FAQ)

How many users were impacted by the Tianya data breach in 2011?

The Tianya breach exposed the records of more than 31 million user accounts, including usernames, passwords, and email addresses.

What happened in the Tianya forum breach?

In December 2011, attackers breached Tianya’s systems and obtained tens of millions of user records containing usernames, emails, and password data. This leak affected one of China's most influential online forums.

What kind of information was leaked in the Tianya breach?

The leaked data included usernames, user email addresses, and account passwords associated with Tianya forum accounts.

When did the Tianya data breach take place?

The security breach at Tianya was carried out in December 2011, during the forum's period of highest popularity and activity.

How can I check if I'm in the Tianya breach?

You can check if your information was part of the Tianya breach by utilizing the DeHashed search engine.