Abstract: Mobile ad hoc network (MANET) is a collection of mobile hosts without the required intervention of any existing infrastructure or centralized access point such as a base station. MANET has the dynamic infrastructure hence it is highly vulnerable to attacks. Several attacks are possible in MANET networks and among them routing attack could cause the worst damage. There are several solutions available for mitigating the routing attacks based on the intrusion response techniques but most of them isolate the malicious node only based on the binary decisions taken for severity in attacks. This will cause additional damage to the network. Risk mitigating techniques is one of the important factor in MANET environment. This paper surveyed various risk mitigating techniques and compare their various parameters. Existing techniques does not consider the Risk in taking countermeasures. Therefore there is a need to implement the new risk mitigating technique that consider the risk of both routing attacks and their countermeasures.