COMMENTARY: Depending on your business setup, some vendors may integrate with nearly everything your organization touches technologically. Perhaps vendors run your payroll. Store customer data. Manage your cloud infrastructure. Accept payments.
Each integration is a doorway for risk. And not every vendor will close that door the way you’d hope. Cyber due diligence can help discover the gap between trusting that a vendor is secure and verifying that they are.
Security practices can't be assumed
Vendor onboarding is still treated as a paperwork exercise by many procurement teams. Contracts are signed, service level agreements are filed away, and cybersecurity is glossed over with a checkbox. Organizations are then left vulnerable to risks they didn’t realize they accepted. Maybe the vendor stores customer data on legacy servers. Perhaps they don’t encrypt sensitive files. Maybe they don’t have an incident response plan documented anywhere. Such flaws may never be discovered if you don’t ask the right questions prior to contract completion.
Cyber due diligence lays those questions out in black and white. Inquire about how data is protected, who has access to it, and how the team will respond if there is a breach. If you skip this step, you’re blindly signing a contract and assuming the other party has your best interests in mind. But trust is not a security control.
Regulatory compliance
Vendor management is something every company should take seriously. Consider that many privacy and data protection laws impose obligations on organizations regarding personal information handled by third-party vendors. Regulators may want to know what steps you take to ensure that vendors are handling sensitive information properly. “We don’t know” is not an acceptable answer during an audit or data breach investigation. A vendor’s noncompliance with HIPAA or applicable state privacy laws can expose your organization to legal and regulatory risk, depending on the circumstances.
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Assessing a vendor’s compliance posture, certifications, and audit results before signing a contract allows your organization to better understand the risks. Performing due diligence also protects your company from reputational risk, because most consumers will not distinguish between a security failure caused by your organization and one caused by a third party handling data on your behalf.
Incident response capabilities
Inquire about the vendor’s incident response plan. That plan can reveal important details about a vendor’s preparedness for security incidents. Ask how quickly they detect a breach, how they communicate with affected parties, and how they contain the damage if they’re under attack. If they can’t answer these questions clearly, ask how their incident response plan is documented, tested, and updated.
This is especially important if your company works with vendors who store legal or investigative information. If you work with a vendor who provides law firm investigation support, for instance, they may store case files, client correspondence, or other evidence associated with pending litigation. A breach of that information could put pending cases in jeopardy and expose privileged data. Examining your vendors’ incident response preparedness is especially important when they handle this information.
Third-party risk doesn’t stay with the third party
Vendor breaches can rapidly become part of a larger issue. Organizations often trust vendors who need broad access to their systems. A compromised vendor can become an entry point into a customer’s network, particularly if it has broad system access. Mapping these relationships during due diligence can reveal vendor access that might otherwise go unnoticed until a breach occurs.
Formalizing this mapping as part of vendor risk reviews turns assumptions about third-party access into documented findings. Security analysts can identify which vendors should be addressed first based on the sensitive data and systems they can access, as well as the controls already in place. Instead of security teams spreading themselves thin across every vendor on a lengthy list, they can focus their limited time and resources on where they are most needed.
Making due diligence a standard practice
Cyber due diligence should be so routine that it’s part of vendor onboarding standards, not an exceptional ask reserved for high-dollar or headline-grabbing contracts. Questionnaires, written requests for evidence, and regular refresh cycles keep vendor risk top of mind, instead of an afterthought once contracts are signed. Vendors change. Shifting personnel, mergers, and changes to infrastructure can all weaken a vendor’s security posture years after your initial due diligence was “checked off.”
Companies that treat cyber due diligence as an ongoing process rather than an occasional box-checking exercise are far better equipped to manage third-party risk. They catch loose security practices before they cause a breach. They make sure sensitive data is protected throughout the entire vendor lifecycle. That’s the kind of due diligence that builds a reliable vendor risk program.
