uuu9 data breach

Breach date: 2016-09-06. Added to this index: 2016-12-27. Accounts affected: about 7.5M. Domain: uuu9.com.

What happened

In September 2016, data was allegedly obtained from the Chinese website known as uuu9.com and contained 7.5M accounts. Whilst there is evidence that the data is legitimate, due to the difficulty of emphatically verifying the Chinese breach it has been flagged as "unverified". The data in the breach contains email addresses and user names. Read more about Chinese data breaches in Have I Been Pwned.

Breach data sourced from Have I Been Pwned, used under CC BY 4.0. Additional breach metadata provided by XposedOrNot. DataExposed is an independent service and is not affiliated with or endorsed by either.

What was exposed

  • Email addresses: The email address you used to register or log in. It is the most common field in breaches because it doubles as your username on most sites.
  • Passwords: The secret you use to sign in, stored by the breached service either in plain text, in a scrambled form called a hash, or encrypted. How it was stored decides how quickly it can be recovered.
  • Usernames: The handle or login name you chose for an account, which may be public on forums, games and social platforms or used privately to sign in.

What to do now

  1. Check whether your own address is in this dataset with the free email breach check.
  2. Change the password on this service and every other site where you used the same password.
  3. Turn on two-factor authentication on your email account first, because it is the reset path for everything else.
  4. Treat calls and messages that quote real details about you as hostile until you verify them another way.

Frequently asked questions

What data was leaked in the uuu9 breach?

The uuu9 breach exposed Email addresses, Passwords, Usernames. About 7.5M accounts were affected.

Was I affected by the uuu9 breach?

Run the free email breach check with the address you used on that service. It will tell you whether your address appears in this dataset.

What should I do about the uuu9 breach?

Change the password on that account and everywhere you reused it, then turn on two-factor authentication. Passwords from this breach are traded and tried automatically against other sites.

Next steps