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Serco

Disclosed Aug 1, 20233 years ago10,140 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 exposedNames, Social Security numbers, Dates of birth, Addresses, Emails, Insurance
SectorGovernment · US
StatusConfirmed
Part ofMoveit (2023)

Sources

Source
California Attorney General breach notice: Sercooag.ca.gov · Official notice
California AG breach notice: Serco, Inc.oag.ca.gov · Regulator
US govt contractor Serco discloses data breach after MoveIT attacksbleepingcomputer.com · News
Indiana Attorney General 2023 data breach report: Sercoin.gov · Official notice

Notices filed

WhereFiledPeople
Indiana AGresidents of INAug 1, 202339
California AGresidents of CAAug 2, 2023
ResearchtotalAug 2, 2023

Same campaign

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Cadence BankMOVEit zero-day used to steal Cadence Bank customer dataSep 15, 20233 years agoSupply chain14K
HoneywellMOVEit breach exposes pension plan participants' names and SSNsSep 13, 20233 years agoSupply chainUnknown
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Colorado Department of Health Care Policy & FinancingIBM MOVEit breach exposes health data of 4.1 million Colorado Medicaid membersAug 11, 20233 years agoVendor breach4.1M
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Missouri Department of Social ServicesIBM MOVEit breach exposes Missouri Medicaid participants' dataAug 7, 20233 years agoVendor breach740K
Radius Global SolutionsCollections firm Radius hit by MOVEit breach exposing consumer dataAug 4, 20233 years agoSupply chain632K
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ShellShell confirms employee data accessed through MOVEit TransferJul 6, 20233 years agoSupply chainUnverifiedUnknown
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F&G Annuities & LifeVendor PBI MOVEit breach exposes data of many F&G policyholdersJun 30, 20233 years agoVendor breachUnknown
TIAAVendor PBI MOVEit breach exposes TIAA participant dataJun 30, 20233 years agoVendor breachUnknown
National Student ClearinghouseMOVEit breach at student records nonprofit affects 890 schoolsJun 29, 20233 years agoSupply chainUnknown
Siemens EnergySiemens Energy confirms it was targeted in MOVEit attacksJun 29, 20233 years agoSupply chainUnverifiedUnknown
UCLAUCLA confirms MOVEit Transfer compromise and notifies affected peopleJun 29, 20233 years agoSupply chainUnverifiedUnknown
Talcott ResolutionVendor PBI MOVEit breach exposes over half a million Talcott customersJun 27, 20233 years agoVendor breachUnknown
Corebridge FinancialVendor MOVEit breach exposes Corebridge customers' SSNs and policy numbersJun 26, 20233 years agoVendor breach6.5M
Jackson National Life InsuranceVendor PBI MOVEit breach exposes 700,000 to 800,000 Jackson customersJun 26, 20233 years agoVendor breach853K
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Genworth FinancialVendor MOVEit breach exposes data of 2.5 to 2.7 million life insurance customersJun 22, 20233 years agoVendor breach2.5M
Wilton ReassuranceVendor PBI MOVEit breach exposes 1.48 million insurance customersJun 22, 20233 years agoVendor breach1.5M
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History of this record
  • 2026-09-25 · records_basis: empty to organization · backfill source
  • 2026-09-25 · records: empty to 10140 · backfill source
  • 2026-09-25 · disclosed: 2023-08-02 to 2023-08-01 · backfill source
  • 2026-09-25 · campaign: empty to moveit-2023 · seed source
  • 2026-09-25 · sector: other to government · seed source
  • 2026-09-25 · attack: unknown to third-party · seed source
  • 2026-09-25 · data_types: [] to ["names","ssn","dob","addresses","emails","insurance"] · seed source
  • 2026-09-25 · discovered: empty to 2023-06-30 · seed source
  • 2026-09-25 · summary: 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. · seed source
  • 2026-09-25 · title: empty to Benefits vendor CBIZ MOVEit breach exposes Serco US staff data · seed source
  • 2026-09-25 · added · backfill source

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

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