In this talk, we discuss a cybersecurity model: An attacker can launch multiple attacks against a target with a termination strategy that says that the attacker will stop after observing a number of successful attacks or when the attacker is out of attack resources. However, the attacker's observation of the attack outcomes has an observation error that is specified by both a false-negative and a false-positive probability. The novelty of our study is the accommodation of the dependence between the attack outcomes that cannot be assumed away, because the results will be misleading.