top of page

24 June 2025

McLaren Health Care sees 743,000 patients affected

McLaren Health Care sees 743,000 patients affected

A ransomware attack between July and August 2024 affecting McLaren Health Care and Karmanos Cancer Institute has resulted in a mammoth data breach affecting nearly 750,000 people.


Hackers stole the data of 743,131 people, including their Social Security numbers, health insurance information, driver's license details, names and medical data.


The attack has been linked to the INC ransomware gang, however McLaren's public statement failed to directly attribute the attack to any group.

Copyright @2026 The University of Hong Kong. All Rights Reserved.
bottom of page