Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

MasTec

Disclosed Jun 5, 202625,220 affectedConfirmed

Official notice

What is known

People affected25,220 (as reported by the organization)
DisclosedJun 5, 2026
DiscoveredApr 23, 2026
HappenedAug 9, 2025
AttackNot stated
Data exposedSocial Security numbersPayment cardsFinancialDates of birthAddressesNames
SectorOther · US
StatusConfirmed

Sources

Official noticeoag.my.site.com
Texas Attorney General data security breach report BR-0005098: MasTec
Official noticeago.vermont.gov
Vermont Attorney General breach report: MasTec
Official noticein.gov
Indiana Attorney General 2026 data breach report: MasTec

Notices filed

Residents of VTJun 5
Vermont AG8 people
Residents of INJun 5
Indiana AG54 people
Residents of TXJun 9
Texas AG4,827 people
History of this record
disclosed2026-09-25
2026-06-09 to 2026-06-05by backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about MasTec