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Breaches.

Sam's Club

Disclosed Mar 28, 20251 year agoUnverified

Clop lists Sam's Club on leak site; retailer investigates

Sam's Club said it was investigating reports of a potential security incident after the Clop gang added it to its leak site amid Cleo-related extortion; Clop did not publish proof.

What is known

People affectedNot stated in the sources we have
DisclosedMar 28, 2025
AttackExtortion
Data exposedNot stated
SectorRetail · US
StatusUnverified: not yet confirmed by an official notice, a filing or the organization
Part ofCleo (2024)

Sources

Source
Retail giant Sam's Club investigates Clop ransomware breach claimsbleepingcomputer.com · News

Notices filed

WhereFiledPeople
ResearchtotalMar 28, 2025

Same campaign

OrganizationAffected
HertzCleo zero-day breach exposes Hertz customers' licenses and card dataApr 11, 20251 year agoSupply chain1.2M
WK KelloggWK Kellogg employee data stolen in Cleo file transfer attacksApr 4, 20251 year agoSupply chain4,093
Western Alliance BankCleo zero-day breach exposes 21,899 Western Alliance Bank customersMar 14, 20251 year agoSupply chain22K

Other breaches at Sam's Club

BreachAffected
Disclosed Oct 21, 2020Oct 21, 20205 years agoHacking286K
History of this record
  • 2026-09-25 · added · seed source

First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.

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