Cyberattack at Medical Instrumentation Maker, Cytek Biosciences
Fremont, California-based medical instrumentation maker, Cytek Biosciences, Inc., suffered a cyberattack in November which resulted in threat actors stealing personally identifiable information in the hack.
“Cytek Biosciences experienced a data security incident involving unauthorized access to certain of our systems that occurred on or around November 1, 2025,” the company said in a letter to victims. “Based on our investigation, we learned on or around November 28, 2025, that, in connection with this issue, an unauthorized party obtained certain of your personal information.”
The information varied by affected individual and may have included, to the extent provided to Cytek, name, contact information (e.g., postal address, email address, and phone number), date of birth, Social Security number, driver’s license number, government-issued ID number, citizenship status, signature, health and medical information, financial account and compensation information, as well as Cytek employee account username and password.