Wireless Sensor Network is a vast topic with a lot of aspects. As Users of WSN are increasing Day by Day the threats of WSN are also increasing. The Architectural structure of WSN is very Unstable and therefore its Transmission is very Vulnerable. In this Study it is Evaluated the threats and Evasion from various type of Attacks. Due to the limitations in resource of sensor nodes, existing network security methods are not well suitable for wireless sensor networks. As a pivotal issue security in remote sensor networks has drawn in a great deal of consideration in the new year. In this paper we tended to the most common attacks and proposed a novel detection algorithm of progressively situations with a proposition of expansion of future work to avoid Attacks and how to Evade in WSN.