ZOLL Defibrillator / Monitor M Series, E Series, and R Series have a default password for System Configuration mode, which allows physically proximate attackers to modify device configuration and cause a denial of service (adverse human health effects).

ZOLL Defibrillator / Monitor X Series has a default (1) supervisor password and (2) service password, which allows physically proximate attackers to modify device configuration and cause a denial of service (adverse human health effects).