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Listed on a ransomware leak site

FISERV.COM

fiserv.com

FISERV.COM was listed on the Clop and Everest leak site on May 3, 2026. Brandefense has recorded 2 separate claims against it. Information as of Oct 19, 2026.

Updated continuously · figures as of Oct 19, 2026
Claimed by
Clop, Everest
First listed
May 3, 2026
Claims recorded
2

2 Leak-Site Claims.

ClopConfirmed claim
Posted on the leak site
Aug 12, 2026
Collected by Brandefense
Aug 12, 2026
Data claimed
Not stated
Leak-site post text, written by the group
Fiserv is a leading American financial technology company headquartered in Milwaukee, Wisconsin. It provides payment processing, banking software, and financial services technology to banks, credit unions, merchants, and other financial institutions worldwide. Its services include core banking systems, digital payments, card processing, and data analytics. Fiserv operates globally and is listed on the NASDAQ stock exchange.
EverestConfirmed claim
Posted on the leak site
May 3, 2026
Collected by Brandefense
May 3, 2026
Data claimed
Not stated
Leak-site post text, written by the group
Fiserv is a global financial technology company headquartered in Milwaukee, Wisconsin, United States. It provides financial services technology solutions including payment processing, core banking systems, digital banking platforms, and merchant acquiring services. Serving banks, credit unions, retailers, and businesses worldwide, Fiserv operates across the fintech and banking technology industry and is one of the largest providers of financial services infrastructure globally.

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Other confirmed victims claimed by the same group
VictimClaimed byCountryIndustryData claimedPosted
ALDOGROUP.COM(ALDOSHOES.COM)
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ClopCACanadaRetailNot stated
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SMAPCENTER-UAH.EDU
smapcenter-uah.edu
ClopESSpainEducation and ResearchNot stated
DAD-CO.TH
dad-co.th
ClopTHThailandUnknownNot stated
CLOUD-CLEARWAYGROUP.COM
cloud-clearwaygroup.com
ClopUnknownUnknownNot stated
HODERO-HOLDINGS-LTDClopCACanadaUnknownNot stated
Other confirmed victims in the same industry
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PingCAP / TiDB Cloud
pingcap.com
FulcrumsecUSUnited StatesTechnologyNot stated
Merit Financial Group
meritfinancialadvisors.com
StormUSUnited StatesFinancial ServicesNot stated
Finzly Corp
finzly.com
N0nUSUnited StatesFinancial ServicesNot stated
Amagi Media Labs
amagi.com
N0nINIndiaTechnologyNot stated
All Business Technologies (Fox Hill bookkeeping and tax practice)
allbusinesstechnologies.com
N0nUSUnited StatesTechnologyNot stated
********rta.ch
rta.ch
CloakCHSwitzerlandFinancial ServicesNot stated

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Figures as of Oct 19, 2026. Confirmed leak-site claims collected by Brandefense technologies and validated by Brandefense analysts.

Listed on a leak site means a ransomware group has claimed the company; it is not a confirmed breach. To request a correction or removal, contact Brandefense.