Nielsen

Disclosed Jun 15, 20179 years agoConfirmed

Official notice

What is known

People affected	Not stated in the sources we have
Disclosed	Jun 15, 2017
Happened	May 18, 2017
Attack	Not stated
Data exposed	Names, Social Security numbers, Addresses
Sector	Other · US
Status	Confirmed

Sources

Source	Kind
Indiana Attorney General 2017 data breach report: Nielsenin.gov · Official notice	Official notice
Maine Attorney General breach notice archive: Nielsenmaine.gov · Official notice	Official notice

Notices filed

Where	Filed	People
Indiana AGresidents of IN	Jun 15, 2017	4
Maine AGresidents of ME	Jun 15, 2017	2

Other breaches at Nielsen

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Feb 4, 2014Feb 4, 201412 years ago	Feb 4, 201412 years ago	Not stated	Other	Confirmed	Unknown

History of this record

2026-09-25 · data_types: [] to ["names","ssn","addresses"] · backfill source
2026-09-25 · added · backfill source

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

Everything about Nielsen

New breaches by email

Wednesdays, only in weeks with newly disclosed breaches, the largest first.