2026 TSYS — Everest ransomware claim (May 29)
Data compromised
Unspecified payments data per actor marketing
Technical writeup
BreachHistory cataloged May 29, 2026 Everest marketing against TSYS (Global Payments ecosystem). Distinct from TSYS’s 2020 Conti incident. No new company notice at catalog time.
Root cause
Everest extortion claim