Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Serco

Disclosed Aug 1, 202310,140 affectedConfirmed

Official notice

Benefits vendor CBIZ MOVEit breach exposes Serco US staff data

Serco Inc, the Americas unit of Serco Group, said its benefits administrator CBIZ was breached via MOVEit, exposing names, Social Security numbers, birth dates, addresses and benefit selections of over 10,000 people.

What is known

People affected10,140 (as reported by the organization)
DisclosedAug 1, 2023
DiscoveredJun 30, 2023
HappenedMay 31, 2023
AttackVendor breach
Data exposedNamesSocial Security numbersDates of birthAddressesEmailsInsurance
SectorGovernment · US
StatusConfirmed
Part ofMoveit (2023)

Sources

Official noticeoag.ca.gov
California Attorney General breach notice: Serco
Regulatoroag.ca.gov
California AG breach notice: Serco, Inc.
Newsbleepingcomputer.com
US govt contractor Serco discloses data breach after MoveIT attacks
Official noticein.gov
Indiana Attorney General 2023 data breach report: Serco

Notices filed

Residents of INAug 1, 2023
Indiana AG39 people
Residents of CAAug 2, 2023
California AGCount not stated
TotalAug 2, 2023
ResearchCount not stated

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History of this record
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 10140by backfillSource
disclosed2026-09-25
2023-08-02 to 2023-08-01by backfillSource
campaign2026-09-25
empty to moveit-2023by seedSource
sector2026-09-25
other to governmentby seedSource
attack2026-09-25
unknown to third-partyby seedSource
data_types2026-09-25
[] to ["names","ssn","dob","addresses","emails","insurance"]by seedSource
discovered2026-09-25
empty to 2023-06-30by seedSource
summary2026-09-25
empty to Serco Inc, the Americas unit of Serco Group, said its benefits administrator CBIZ was breached via MOVEit, exposing names, Social Security numbers, birth dates, addresses and benefit selections of over 10,000 people.by seedSource
title2026-09-25
empty to Benefits vendor CBIZ MOVEit breach exposes Serco US staff databy 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.

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