Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Hanover INsurance

Disclosed Mar 26, 201815,422 affectedConfirmed

Official notice

What is known

People affected15,422 (as reported by the organization)
DisclosedMar 26, 2018
DiscoveredAug 30, 2018
HappenedMar 16, 2018
AttackNot stated
Data exposedNot stated
SectorInsurance · US
StatusConfirmed

Sources

Official noticejustice.oregon.gov
Oregon DOJ breach notice: Hanover INsurance
Official noticein.gov
Indiana Attorney General 2018 data breach report: Hanover Insurance

Notices filed

Residents of INMar 26, 2018
Indiana AG174 people
Residents of ORNov 19, 2018
Oregon DOJ460 people

Other breaches at Hanover INsurance

Breach, details not statedBreach notice filed with the Indiana AG, details not stated.18K affectedInsuranceUSFeb 26, 2021
History of this record
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 15422by backfillSource
disclosed2026-09-25
2018-11-19 to 2018-03-26by backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about Hanover INsurance