A vulnerability is a security weakness found in a system, which can be used by the attacker to perform unauthorized operations while the exploit takes advantage of that vulnerability or bug.
Design vulnerability makes a developer derive the specifications based on the security requirements and address its implementation securely. Thus, it takes more time and effort to resolve the issue, compared to the other classes of vulnerabilities.
Remote vulnerability is a condition where the attacker has no prior access, but the vulnerability can still be exploited by triggering the malicious piece of code over the network.
