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Blockchain is a peer to peer based network where only sender and a receiver are involved in a transaction and it removes the involvement of trusted third party so as to make itfast and cheap. The blockchain technology is expanding and pro-grassing day by day and incorporates a truly shinning future in the coming years. The transparency, trust and temper proof characteristics have led to numerous applications of it like bitc oin, ethereal etc. It may be a successful technology in making the business and organizational activities more secure, proficient and impressive. Although there are tremendous features of this technology but still the security is a big concern over it. In this paper we are going to discuss some major vulnerabilities and their possible solutions provided by the authors on blockchain technology and we will also propose a framework for software loopholeissue to save the network from any kind of pitfalls where it simply keep distanced the untrusted network with the nodes of the blockchain [ABSTRACT FROM AUTHOR]