The vulnerability of the microprogrammed software of the ABB AC700F and AC900F controllers, as well as the ABB Freelance SCADA system, arises from the comparison of numerical ranges without any necessary checks during request processing. This allows a intruder to cause the controller to stop working.

The vulnerability of the microprogrammed software of the ABB AC700F and AC900F controllers, as well as the ABB Freelance SCADA system, lies in the comparison of numerical ranges without any minimal checks during request processing. Exploiting this vulnerability could allow a malicious actor,...