Dissertation (MSc Information Technology)Network Vulnerabilities are weaknesses that allow attackers to bypass communication systems or network security. This grants the attackers access to crucial information on victim’s computer systems. So, analysis of network vulnerabilities is highly recommended as it helps to identify them in order to ensure a secured network. The experiments for this study were carried out on three networking environments. The first one was the CIVE LAN (as the main target), the second one was the COED LAN, in which these two are the subnets of UDOM core network. And the third one was an external network. But unfortunately, from the external network, the targets were not reachable. So the scans were successfully conducted on two subnets of UDOM core network which were CIVE LAN (as a Subnet 1) and COED LAN (as a Subnet 2). Whereby, several scans were performed on 10 core networking devices as targets that located within CIVE LAN, by using two network vulnerabilities scanners namely Nessus Professional 8.3.2 and Nexpose Community 6.5.64. The results of the experiments were also analyzed by these two tools automatically. As each detected network vulnerability has its proper measure that proposed so as to mitigate it in order to ensure a secured network within CIVE.