This In this paper we present an analysis of ad hoc network and how the attacks are prominence on the ad hoc network. Basically ad hoc network is a combination of several nodes which are linked over without wires which means wireless medium is used for this topology. In addition, ad hoc networks are design for particular environment even though it works in most difficult surrounds. Security aspects are more new in ad hoc networks as compares to old networks, still ad hoc networks are faces many security problems in current scenario. Due to the environment specific nature of the ad hoc networks its implementation is not as easy as we think. In this article we also discuss some security attacks.