Swinger website Adult Friend Finder said in 2016 that as many as 412 million users had their personal information exposed — the company'ssecond hack in a year.
Equifax disclosed in 2017 that personal information of as many as 143 million people was compromised.
The company revealed in 2017 that the accounts for every single customer during that time had been breached, including users of Tumblr and Flickr.
Altaba, what's left of Yahoo after the company sold most of its properties to Verizon, paid million last year to settle charges that it misled investors about the hack.
Breach date: 19 April 2016 Date added to HIBP: 8 July 2016 Compromised accounts: 4,009,640 Compromised data: Device information, Email addresses, IP addresses, Passwords, Usernames Permalink In late 2011, a series of data breaches in China affected up to 100 million users, including 7.5 million from the gaming site known as 17173.
Breach date: 19 February 2018 Date added to HIBP: 26 February 2018 Compromised accounts: 80,115,532 Compromised data: Email addresses, Passwords Permalink In December 2017, the Belgian motorcycle forum 2fast4u discovered a data breach of their system.
That number is huge, but it's not the worst breach ever.
Yahoo's epic, historic data breach in 2013 compromised 3 billion people in total.
First American Financial Corp., an American real estate and mortgage insurer, revealed in May 2019 that it left 900 million sensitive customer files exposed.
The trove of digital documents that could have been accessed included private information, such as Social Security numbers and bank accounts.