Contracting third parties to meet specific security standards is prudent because vulnerabilities within their networks can be exploited to gain unauthorized access to a client's environment. Third-party vendors often have access to an organization's sensitive data and systems, which can become a potential entry point for cyber attackers. By ensuring that third parties adhere to stringent security standards, an organization can better protect itself against the risk of data breaches and cyber attacks that may originate from less secure third-party networks. This proactive approach to third-party security helps maintain the integrity and confidentiality of the organization's data and systems.