Your Vendors Are Your Biggest Security Risk. Here's What to Do About It.

Most community banks know their own security posture pretty well. Patch cadence, MFA coverage, encryption standards, endpoint protection. They’ve been through the exams. They’ve answered the questions. They know the drill.

But ask them about their vendors and the conversation gets quiet.

What data does your core processor store? Where does it live? Who has access? When was their last independent security assessment? What happens to your operations if they go down for three days?

For most banks, the honest answer to at least two of those questions is “I don’t know.” And that’s the problem.

The Risk You’re Not Managing

Your bank probably has a vendor management policy. It might even be a good one. But there’s a gap between having a policy and actually managing vendor risk. Here’s what that gap looks like in practice:

You send a vendor questionnaire. They send back answers. You file it. You check the box. Maybe you review it annually.

That’s not risk management. That’s documentation.

Real vendor risk management means understanding what your critical vendors actually do with your data, how they protect it, and what happens when something goes wrong. It means treating your vendor relationships as an extension of your own security program, not a separate checkbox exercise.

Why This Matters More Now

Examiners are paying closer attention to third-party risk than they were five years ago. The FFIEC’s guidance on third-party relationships makes it clear: you’re responsible for managing the risks your vendors introduce, regardless of what’s in the contract.

That means when your MSP gets hit with ransomware, the regulatory scrutiny lands on you. When your fintech partner has a data breach, your customers’ information is exposed under your name. When your core processor has an outage, your operations stop.

The contract might say the vendor is liable. The regulator doesn’t care. Your customers definitely don’t care.

What to Actually Do

If you’re a community bank and you’re reading this thinking “we should probably do better here,” you’re not alone. Most banks are in the same position. Here’s where to start without turning it into a six-month project.

Identify your critical vendors first. Not all vendors carry the same risk. Your core processor, your MSP, your online banking provider, your cloud services, your payment processor. These are the ones that can take your bank down or expose customer data. Start with those five or six. Don’t try to boil the ocean.

Go beyond the questionnaire. Questionnaires are fine as a starting point, but they’re self-reported. Ask for their SOC 2 report and actually read it. Look at the exceptions and management responses. Ask for their incident response plan. Ask when they last tested it. If they can’t produce these things quickly, that tells you something.

Ask the three questions that matter. For each critical vendor:

• What data do they touch and where does it go?
• When was their last independent security assessment and what did it find?
• What happens to your operations if they go down for 72 hours?

If you can’t answer those, you have work to do.

Map your vendor dependencies. Most banks don’t realize how interconnected their vendor ecosystem is. Your core processor might use a cloud provider that also hosts your online banking platform. A single outage or breach at one provider can cascade across multiple services. Know what depends on what.

Build vendor risk into your incident response plan. When was the last time you ran a tabletop exercise that started with “your core processor just called and said they’ve been breached”? If the answer is never, schedule one. Your IR plan should account for scenarios where the incident isn’t yours, but the impact is.

Review contracts with security in mind. Make sure your vendor agreements include notification requirements (how fast they’ll tell you about an incident), audit rights (your ability to verify their security claims), and clear data handling terms. If your contract doesn’t cover these basics, it’s time for a conversation.

What Examiners Want to See

Examiners aren’t looking for perfection. They’re looking for a defensible process. They want to see that you’ve identified your critical vendors, assessed the risks they introduce, and have a plan for managing those risks over time. They want evidence that you’re asking questions, not just collecting paperwork.

A vendor management program doesn’t need to be complicated. It needs to be real. The banks that struggle in exams are usually the ones with a binder full of questionnaires and no evidence they actually did anything with the answers.

Trust Is Not a Control

I hear this a lot from banks: “We’ve worked with them for years. We trust them.”

That’s fine. Trust is a good reason to do business with someone. It’s a terrible reason to skip due diligence.

The vendors you trust the most are often the ones you scrutinize the least. And they’re usually the ones with the most access to your data and operations. That’s exactly backwards.

Trust your vendors. Verify them anyway. That’s not distrust. That’s a security program.

If your bank needs help building a vendor risk management program that actually works, or you want to stress-test your current third-party relationships, reach out to Vaughn Cyber Group. We help community banks close the gap between policy and practice.