23andMe says hackers stole the ancestry data of nearly 7 million customers. Here's what that means for you.

• Nearly 7 million 23andMe users had their data stolen, with some of it for sale on the dark web.
• Hackers accessed the data with logins that were the same on other websites and already compromised.
• The stolen info included users' names, ancestry data, profile pictures, birth years, and locations.

Back in October, it came to light that customer data from DNA-testing company 23andMe was stolen and put up for sale on the dark web.

We now know exactly how many users were affected: Nearly 7 million.