This record tracks a ransomware attack claimed by the
everest group against
Fiserv. It collects the publicly disclosed attack details — sector, location and
timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAP
Window Zero is the time the breach stayed in the open before
anyone said so — the gap between when the attack was first discovered
on the operator's leak site (t1) and when it was publicly disclosed (t2).
The wider this window, the longer victims, staff and customers were exposed with no warning.
-76days
t1 · Published
t2 · Disclosed
Business Category
Finance / Legal / Insurance
Disclosed / Notified
Feb 17, 2026
Attack Summary
[AI generated] 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.
Leak Screenshots
SAMPLE
Proof-of-breach screenshots the operator posted from the stolen data. Previews are
redacted and locked — the originals are available on HaveIBeenRansom.
Dark Web Exposure
Findings for fiserv.com
— indexed by HaveIBeenRansom.
2,377
found in Infostealer logs
2,252+
found in Traditional breaches
748+
found in Ransomware leaks
Televerde
play · ransomware
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
bankers-bank.com
clop · ransomware
••• emails
contacts_108.csv
Database World ROC · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 20 sources.
Legal Disclaimer:
This ransomware victim record reflects information published on the operator's leak site.
Breach.house does not acquire, download, host, access or redistribute unlawfully obtained data. It indexes only publicly visible information posted by ransomware, breach and infostealer operators and open web sources, without accessing the underlying stolen content. The service supports public awareness, legitimate research and cyber-resilience.