Network security intends to shield the machine from unauthorized and conceivably destructive exercises. Network security is increasingly essential since individuals like to associate with each other all the time by means of the web. All of Personal Computers clients, representatives of expert associations, government hirelings, academicians, social specialists, students, and military people groups keep their most crucial information on web and furthermore do the cash related online exchanges. The web structure is itself with the end goal that there might be the plausibility of dangers to happen. To secure our system we should need to know which kind of security dangers may happen and how. By knowing this we may ready to discover security techniques against these dangers. This paper describes the detailed knowledge about Network exploitation tools that are used by anonymous users to exploit the network and get the credentials of the users.This provides awareness among the developers about the attack intended regarding the websites. Also, results and finding from vulnerabilities detection tools will be discussed in detail.