Overview

• Manpower of Lansing filed breach notifications with the Maine Attorney General on August 11–12, confirming that unauthorized access between December 29, 2024, and January 12, 2025 exposed the personal data of 144,189 people.
• The breach was detected during an IT outage investigation on January 20 and linked to RansomHub, which claimed to have exfiltrated about 500 GB of files before removing its leak entry.
• Manpower of Lansing has reported the incident to the FBI and said it will cooperate fully with investigators to hold the perpetrator(s) accountable.
• ManpowerGroup emphasized that the incident was confined to the independently owned Lansing franchise and did not affect corporate systems.
• The delayed public notification and scope of exposed personal information have prompted law firms to investigate potential class-action lawsuits.