Which DKEAD category has a risk rating based on the threat exploit's potential level of...

The DKEAD category that has a risk rating based on the threat exploit’s potential level of harm is Damage potential. This category assesses the total damage or impact that a threat could cause if it is exploited by an attacker. The risk rating in this category is determined by evaluating the severity of the potential damage, which could range from information disclosure to complete system destruction or loss of system availability.

References:

DREAD Threat Modeling1

OWASP Risk Rating Methodology2

DREAD Threat Modeling: An Introduction to Qualitative Risk Analysis3