Sep 25, 2025 · That’s what happened when Kronos , a workforce management platform, was hit by a ransomware attack in December 2021. The Kronos data breach disrupted payroll systems across thousands of U.S. organizations and left millions at risk.
Nov 9, 2023 · Kronos, a workforce management company used by over 40 million people, suffered a ransomware attack in late 2021 when the Kronos Private Cloud was compromised . This affected thousands of employees and prompted many companies to look for alternative workforce management cloud providers.
Jul 6, 2023 · UKG (Ultimate Kronos Group), a multinational provider of workforce management and human resources (HR) management services, has proposed a $6 million settlement to resolve claims related to a ransomware attack and data breach that was discovered in 2021.
Feb 9, 2026 · The financial services giant alleges that UKG Kronos failed to properly respond to a 2021 cyberattack that crippled payroll systems, exposed employee data and left State Street entangled in regulatory risks across 22 countries.