Biggest Data Breaches

Each of the most recent biggest data breaches resulted in the exposure of huge amounts of personal information and identities

Notable Data Breaches

Adult FriendFinder


Score: 10.0
412,214,295 Records

The adult dating Web site was hacked by a malicious outsider that resulted in the exposure of 412,214,295 million records. The attack had a BLI score of 10. According to Ars Technica, the hacked database appears to be one of the largest ever single data breaches in history and contained account details for numerous adult properties belonging to the California-based Friend Finder Network. The information stolen includes customers' e-mail addresses, IP addresses last used to log-in to the site, and passwords.


Score: 9.8
40,000,000 Records

The adult dating Web site was hit with an identity theft breach by a malicious outsider that resulted in the exposure of 40 million records. The attack had a BLI score of 9.8. Tens of millions of credentials stolen from the site were put up for sale on the dark web, according to International Business Times. The information reportedly included email addresses, plain text passwords, usernames, IP addresses and date of birth records.

17 Media


Score: 9.7
30,000,000 Records

The software company's photo sharing and video streaming app 17 was hacked, resulting in the theft of 30 million records. The identify theft attack was committed by a malicious outsider and received a BLI score of 9.7. According to Motherboard, the hacker advertised email addresses, passwords, phone numbers, and other information from users.

Philippines' Commission on Elections


Score: 9.6
55,000,000 Records

The government agency suffered an identity theft attack from a malicious outsider that accounted for the loss of 55 million records and drew a BLI score of 9.6. The group Anonymous Philippines hacked the commission's website a little over a month before the Philippines was to hold its 3rd automated elections, according to Rappler.



Score: 9.3
27,000,000 Records

The dating site was hit with an account access attack by a malicious outsider that involved 27 million records and received a BLI score of 9.3. A hacker in a dark web hacking forum claimed to have gained access to plaintext passwords from, which he later sold, according to The Next Web.

Mexican Voters


Score: 9.3
93,400,000 Records

According to a number of published reports, millions of Mexican voters had their records exposed online, following an identity theft attack that affected a total of 93.4 million records and resulted in a 9.3 BLI score. Mexican election officials probing the leak of a database containing voter registration records indicated one of the main political parties in Mexico might have played a part, according to International Business Times.



Score: 9.3
45,000,000 Records

The company, which specializes in the acquisition and development of web sites and online communities for various vertical markets, experienced an account access attack by a malicious outsider that exposed 45 million records. The incident scored a BLI of 9.3. VerticalScope said it became aware that data stolen from the company was being made available online. Community member user names, email addresses, hashed passwords, and other information was involved.

U.S. Healthcare Insurer's database


Score: 9.2
9,300,000 Records

An unnamed healthcare insurer was hit with an identity theft attack by a malicious outsider that resulted in the loss of 9.3 million records. It earned a BLI score of 9.2.

Top Scoring Data Breaches

Organization BreachedRecords BreachedDate of BreachType of BreachSource of BreachLocationIndustryRisk Score
JPMorgan Chase83,000,00008/27/14Identity TheftMalicious OutsiderUnited StatesFinancial10.0
Korea Credit Bureau, NH Nonghyup Card, Lotte Card, KB Kookmin Card104,000,00001/20/14Identity TheftMalicious InsiderSouth KoreaFinancial10.0
Target110,000,00011/04/13Financial AccessMalicious OutsiderUnited StatesRetail 10.0
Home Depot109,000,00009/02/14Financial AccessMalicious OutsiderUnited StatesRetail 10.0
MySpace360,000,00006/11/13Account AccessMalicious OutsiderUnited StatesOther10.0
Anthem Insurance Companies (Anthem Blue Cross)78,800,00001/27/15Identity TheftState SponsoredUnited StatesHealthcare10.0
Adult FriendFinder412,214,29510/16/16Account AccessMalicious OutsiderUnited StatesOther10.0
eBay145,000,00005/21/14Identity TheftMalicious OutsiderUnited StatesRetail 10.0
Adobe Systems, Inc152,000,00009/18/13Financial AccessMalicious OutsiderUnited StatesTechnology10.0
CyberVor1,200,000,00008/05/14Account AccessMalicious OutsiderGlobalTechnology10.0

Breach Risk Calculator

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