Vendor management: the cornerstone of cyber readiness

Most organizations do not operate in isolation—and neither does their cyber risk exposure. From cloud and payroll to payment processors and software libraries, vendors, suppliers, and service providers form the backbone of modern operations, but they also expand the attack surface.

In 2024, 32% of the breaches were tied to third- or fourth-party exposures. A single compromised component, update, or credential can ripple across a customer base, making supply chain security one of the most pressing challenges for modern businesses.

Average incident cost – malicious third party – SMEs (N=182)

Image source: Net Diligence

Where supply chain risk shows up

Cyber incidents rarely respect organizational boundaries, and vendor ecosystems can turn isolated weaknesses into enterprise-wide disruptions. Vulnerabilities often emerge in areas such as:

• Software and cloud dependencies – Tampered updates, misconfigurations, and logging gaps across SaaS and IaaS platforms.
• Open-source flaws and zero-day vulnerabilities – A single oversight in widely used code libraries can escalate into mass-scale exposure.
• Access and identity mismanagement – Over-permissioned vendor accounts and stolen credentials enable lateral movement.
• Data handling by vendors – Mishandling sensitive employee or client information can lead to fines and class-action litigation.
• Operational disruption – Vendor outages or compromised updates halt business operations, drain cash flow, and erode customer trust.

Recognizing these risks is the first step toward strengthening reliability and accountability across the digital supply chain.

Strengthen vendor and supply chain readiness

Eliminating every vulnerability is not feasible, which is why organizations must build processes around how vendors are vetted, governed, and integrated into the broader cybersecurity strategy.

• Quantify impact to guide investment – Build a cyber risk balance sheet by mapping critical vendors, modeling potential outage or breach scenarios, and translating them into financial impacts.
• Due diligence and ongoing monitoring – Evaluate vendor safeguards before granting access and monitor continuously, not just at annual review cycles.
• Contractual risk transfer – Use contracts to set control baselines, define responsibilities, and allocate financial accountability. Require proof of cyber and technology E&O coverage.

By combining financial modeling, monitoring, and contractual rigor, organizations can turn vendor management from an unchecked liability into a strategic control, improving negotiating power with vendors, strengthening insurer terms, and laying the foundation for resilient partnerships.

Best practices for mitigating third-party risks

To keep pace with evolving threats, the most effective programs embed vendor oversight into ongoing governance. Consider these best practices:

• Inventory and tier vendors
• Standardize vendor due diligence
• Harden identity and access controls
• Set clear security requirements in contracts
• Require proof of insurance
• Quantify third-party risks and align coverage
• Validate backup and recovery
• Monitor vendors’ cybersecurity continuously
• Prepare for shared incidents
• Review and refresh vendor relationships regularly

The role of trusted partners

Managing vendor risk requires more than internal oversight. The complexity of today’s supply chains makes it essential to engage external partners who bring expertise, advocacy, and resources to the table:

• Insurance advisor – Translates insurer expectations into vendor-control steps, quantifies loss scenarios, and structures coverage for contingent exposures.
• Insurance company partner – Provides vendor-risk platforms, assessment tools, and access to vetted providers, improving underwriting outcomes and reducing costs.
• Incident response – Validates vendor access controls, rehearses joint playbooks, and coordinates during a breach to contain damage and preserve claims outcomes.

Together, these partners extend the capacity of internal teams, strengthen accountability across the supply chain, and reinforce recovery when disruptions occur.

Your next step toward cyber resilience

Vendors are essential to modern business operations, but without structured oversight, they can also be a hidden source of risk. That’s why The Baldwin Group’s cyber team offers practical tools and guidance to help organizations turn vendor oversight into a strategic advantage.

Download our external risk readiness checklist to benchmark your current practices and identify gaps.