CareFirst BlueCross Blueshield

Disclosed May 20, 20151,100,000 affectedConfirmed

Cyber attack on CareFirst exposes data of 1.1 million members

CareFirst BlueCross BlueShield said a cyber attack stole data of about 1.1 million current and former members and others who used its websites.

What is known

People affected	1,100,000 (as reported by the organization)
Disclosed	May 20, 2015
Happened	Jun 19, 2014
Attack	Hacking
Data exposed	NamesDates of birthEmailsInsuranceSocial Security numbers
Sector	Insurance · US
Status	Confirmed

Sources

Official noticeoag.ca.gov

California Attorney General breach notice: CareFirst BlueCross Blueshield

Newsvox.com

CareFirst Says Cyber Attack Stole Data of 1.1 Million Users

Official noticemaine.gov

Maine Attorney General breach notice archive: CareFirst BlueCross BlueShield

Notices filed

Residents of CAMay 20, 2015

California AGCount not stated

TotalMay 20, 2015

Research1,100,000 people

Residents of MEMay 20, 2015

Maine AG6 people

History of this record

data_types2026-09-25

["names","dob","emails","insurance"] to ["names","dob","emails","insurance","ssn"]by backfillSource

sector2026-09-25

other to insuranceby seedSource

attack2026-09-25

unknown to hackingby seedSource

data_types2026-09-25

[] to ["names","dob","emails","insurance"]by seedSource

records_basis2026-09-25

empty to organizationby seedSource

records2026-09-25

empty to 1100000by seedSource

summary2026-09-25

empty to CareFirst BlueCross BlueShield said a cyber attack stole data of about 1.1 million current and former members and others who used its websites.by seedSource

title2026-09-25

empty to Cyber attack on CareFirst exposes data of 1.1 million membersby seedSource

Added2026-09-25

First recordedby backfillSource

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

Everything about CareFirst BlueCross Blueshield