Most organizations invest significantly in securing their own systems while leaving the door open through their vendor relationships. Third-party vendors represent one of the most exploited attack surfaces in enterprise security, not because organizations are unaware of the risk, but because vendor evaluation is treated as a procurement exercise rather than a security one.
Tracy R. Reed, Director of the Cybersecurity Practice at Unrisk, Certified Information Systems Security Professional (CISSP), International Organization for Standardization (ISO) 27001 Lead Auditor, and Cybersecurity Maturity Model Certification (CMMC) Lead Assessor with more than 25 years of experience helping global enterprises, federal contractors, and early-stage tech secure their vendor ecosystems, is direct about the exposure. “Your organization is only as secure as the weakest vendor in your supply chain,” Reed states.
Not All Vendors Deserve the Same Scrutiny
The first mistake organizations make in vendor risk management is applying the same level of evaluation to every vendor, regardless of what they access or what they touch. A cloud provider handling customer data and a supplier of office materials do not present equivalent risk profiles. Treating them identically either overwhelms the security team or, more commonly, produces a watered-down process that fails to adequately evaluate the vendors that actually matter.
A tiered risk approach resolves this. Reed recommends classifying vendors based on three factors: the data they access, the systems they interact with, and the business impact if the vendor were compromised. High-tier vendors receive rigorous evaluation. Lower-tier vendors receive proportional scrutiny. This structure allows organizations to scale their vendor security program without requiring the same depth of review for every relationship, and ensures that the most consequential vendor connections receive the attention they warrant.
Questionnaires Are the Floor, Not the Ceiling
Security questionnaires are a starting point, not a conclusion. Vendors can complete questionnaires inaccurately, incompletely, or with an optimistic bias that does not reflect their actual security posture. Reed advocates pushing significantly beyond the questionnaire by requesting third-party attestations such as System and Organization Controls (SOC) 2, ISO 27001, or CMMC certifications, reviewing breach history, and asking operational questions that reveal how a vendor actually manages security day to day.
The questions that surface the most meaningful information are specific and operational. Does the vendor enforce multi-factor authentication? Is data encrypted both at rest and in transit? How frequently do they test their incident response plan, and what does that testing actually look like?
At Unrisk, Reed notes, the firm helps clients design vendor review processes that move from checklist compliance into genuine operational assurance, evaluating whether a vendor’s security posture holds up under scrutiny rather than simply whether they have checked the required boxes.
Security Belongs in the Contract
Due diligence without contractual enforcement produces organizations that know their vendors are inadequately secured but have no mechanism to compel improvement. When a vendor’s negligence contributes to a breach, the reputational and legal consequences fall on the organization whose customer data was exposed, regardless of whose systems were compromised first. The contract establishes accountability before an incident occurs.
Reed recommends ensuring that vendor contracts include security service-level agreements, specific breach-notification timelines, and an explicit right to audit. These provisions do more than protect the organization legally. They set behavioral expectations that drive better vendor security practices. Vendors who know they are subject to audit and contractually bound to specific security standards operate differently from those who are not. The contract is not a backup plan. It is part of the security program.
Vendor risk is not a problem that gets solved once and for all. It requires a repeatable, risk-based process embedded into procurement from the beginning, evaluated at onboarding, monitored continuously, and reassessed whenever a vendor’s scope of access changes. The organizations that treat it this way are the ones that avoid discovering their exposure through a breach notification.
Follow Tracy R. Reed on LinkedIn for more insights on vendor risk management, cybersecurity compliance, and building third-party security programs that go beyond the standard.
