There is no limit on the number of failed login attempts permitted with the Clinician Password or the Serial Number Clinician Password. An attacker could execute a brute-force attack to gain unauthorized access to the ventilator, and then make changes to device settings that could disrupt the function of the device and/or result in unauthorized information disclosure.
https://www.cisa.gov/news-events/ics-medical-advisories/icsma-24-319-01