The BEST way to manage Fourth-Nth Party risk is:

Fourth-Nth party risk refers to the potential threats and vulnerabilities associated with the subcontractors, vendors, or service providers of an organization’s direct third-party partners. This can create a complex network of dependencies and exposures that can affect the organization’s security, data protection, and business resilience. To manage this risk effectively, organizations should conduct comprehensive due diligence on their extended vendor and supplier network, and include contractual stipulations that require notification and approval for any subcontracting activities. This way, the organization can ensure that the subcontractors meet the same standards and expectations as the direct third-party partners, and that they have adequate controls and safeguards in place to protect the organization’s data and systems. Additionally, the organization should monitor and assess the performance and compliance of the subcontractors on a regular basis, and update the contract provisions as needed to reflect any changes in the risk environment. References:

Understanding 4th- and Nth-Party Risk: What Do You Need to Know?

Best Practices for Fourth and Nth Party Management

Fourth-Party Risk Management: Best Practices