Ransomware victim disclosure
← All victimsFiserv
Claimed by everest · listed 18 days ago
Status timeline
- Listed
May 3, 2026
- Data leaked
At a glance
- Group
- everest
- Status
- Data leaked
- Country
- US
- Sector
- Financial Services
- Listed on leak site
- May 3, 2026
About the victim
AI dossier — public-source company profileFiserv is a global financial technology company and one of the largest fintech providers in the world, headquartered in Brookfield, Wisconsin. It delivers core banking systems, digital banking platforms, payment processing, and merchant acquiring services to banks, credit unions, retailers, businesses, and government entities worldwide. The company serves 70% of the world's leading brands and reaches 100% of U.S. households through its financial infrastructure.
- Industry
- Financial Services Technology & Payment Processing
- Address
- 255 Fiserv Drive, Brookfield, Wisconsin 53045, United States
- Employees
- 40000
- Founded
- 1984
Attack summary
Severity: critical — Fiserv is core financial infrastructure for thousands of banks, credit unions, and merchants globally, processing payments and banking data at massive scale. A confirmed data publication by a ransomware group against such a systemically important fintech operator constitutes a critical disclosure, with likely exposure of regulated financial PII and sensitive institutional data at scale.The Everest ransomware group claims to have compromised Fiserv and has published data (disclosed status: data_published), indicating exfiltration of company data; no ransom amount or specific data volume was stated in the post.
Data the group says was taken
AI dossier — extracted from the leak post- Financial services technology data
- Payment processing records
- Banking platform data
- Merchant and corporate client records
- Internal business documents
Original description
AI-summarised, not from the leak postFiserv 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.
The leak post
captured from the group's site© 2026, All rights reserved Citizens Bank - Database Leaked Evaluate a Norstella company - Database Leaked Studio Marchi - Studio Professionale Associato - Database Leaked Super AI - Database Leaked Complete Aircraft Group - Database Leaked Umiles Group - Database Leaked K Subsea Group - Database Leaked Parque Eólico Toabré - Database Leaked PT Brantas Abipraya - Database Leaked Straight Line Logistics - Database Leaked First Priority Group - Database Leaked Hyundai Elevator - Database Leaked UD Trucks - Database Leaked McDonalds India - Database Leaked Tsunami Tsolutions - Database Leaked Atlas Air: MUSE INSECURE - Database Leaked Iron Mountain - Database Leaked Hosowaka Micron Group - Database Leaked Shinwa Co Ltd - Database Leaked SIGMA Processing Group - Database Leaked Acu Trans Solutions LLC - Database Leaked GIBSIN Engineers - Database Leaked ASRock Rack - Database Leaked Reeves Information Technology - Database Leaked WANCHI STEEL INDUSTRIAL - Database Leaked GC Accounting - Database Leaked National Money Mart Company - Database leaked Virginia Records - Database Leaked Morgan Records Management - Database leaked ELC Electroconsult SpA - Databas…
Sources
Source
Indexed 18 days agoThis page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.
