Likelihood is a measure of the possibility of a threat being carried out. A variety of factors can impact the likelihood of a threat being carried out, including how difficult the implementation of the threat is, and how rewarding it would be to the attacker. For example, if a threat required a skilled threat actor with tens of thousands of dollars of computing resources to implement, and the only reward was that they were able to gain access to information that is already public in some other form, the likelihood is low. However, if the threat is relatively easy to accomplish, or if the attacker were to gain valuable information from which they could profit, the likelihood may be higher.