Your MDI Team Is Wearing a Cybersecurity Hat. Nobody Gave Them the Training to Go With It.

Medical device integration has never been more critical to patient care. But as MDI professionals, we’re increasingly being asked to wear the cybersecurity hat without the training, resources, or support to do it properly.

The reality? Understaffed MDI teams often cut corners on security because they lack the expertise to implement proper controls while keeping devices operational. I’ve seen it happen across dozens of healthcare organizations, and the pattern is always the same: well-intentioned professionals making avoidable mistakes that put their networks at risk.

Let’s break down the five most common security mistakes I see MDI teams make and, more importantly, how to fix them.

Mistake #1: Treating All Medical Devices the Same

The Problem: You’re applying blanket security policies across devices that have wildly different capabilities, vulnerabilities, and clinical uses. A modern infusion pump running a hardened OS is not the same as a legacy ventilator running Windows XP Embedded.

Why It Happens: It’s faster and easier to create one policy than to segment and categorize hundreds of devices. Plus, many teams don’t have an accurate inventory that includes security-relevant details like OS version, patch status, or network requirements.

The Fix:

• Create device tiers based on risk: Critical (life-sustaining), High (directly affects patient care), Medium (diagnostic), and Low (administrative)
• Document security capabilities for each device model: Can it be patched? Does it support encryption? What authentication does it offer?
• Apply tiered controls that match device capabilities and clinical risk tolerance
• Start small: Pick one device category and build your classification system from there

Mistake #2: Skipping Network Segmentation

The Problem: Medical devices are living on the same network segments as workstations, phones, and guest WiFi. When ransomware hits the email server, it spreads to your infusion pumps.

Why It Happens: Network segmentation requires coordination with IT networking teams, approval for infrastructure changes, and careful testing to ensure clinical workflows aren’t disrupted. It’s a big project that keeps getting pushed to next quarter.

The Fix:

• Map clinical workflows first: Understand what devices need to communicate with what systems
• Start with isolation: Move the highest-risk devices (internet-connected, legacy OS) into isolated VLANs immediately
• Implement micro-segmentation where possible using next-gen firewalls or NAC solutions
• Create exception processes that are secure but don’t require a three-week approval cycle for urgent clinical needs

Pro Tip: Document every segmentation decision and exception. You’ll need this for audits and incident response.

Mistake #3: Ignoring Vendor Access Management

The Problem: Vendor technicians have standing remote access to medical devices, often with local admin credentials that never expire. You have no visibility into when they connect, what they do, or whether they’re following security protocols.

Why It Happens: Vendors demand remote access for service contracts and troubleshooting. Clinical teams need devices fixed fast. Security takes a back seat to uptime.

The Fix:

• Implement a privileged access management (PAM) solution specifically for vendor access
• Require just-in-time access: Vendors request access for specific time windows, not permanent VPN credentials
• Log everything: Every vendor session should be recorded and auditable
• Negotiate better contracts: New service agreements should include security requirements like MFA, session logging, and defined access windows
• Create a vendor access policy that Clinical Engineering and Security both sign off on

Mistake #4: Relying Solely on Antivirus

The Problem: You’ve deployed endpoint protection on every compatible device and called it done. Meanwhile, threats are bypassing signature-based detection, exploiting network protocols, and compromising devices through supply chain attacks.

Why It Happens: Antivirus is familiar, relatively easy to deploy, and checks a compliance box. It feels like you’re “doing security” without the complexity of defense-in-depth.

The Fix:

• Layer your defenses: Antivirus is one control, not your entire security strategy
• Deploy network-based detection: Use IDS/IPS to catch lateral movement and command-and-control traffic
• Implement application whitelisting on devices that support it (far more effective than blacklisting)
• Monitor anomalous behavior: Baseline normal device communication patterns and alert on deviations
• Focus on containment: Assume compromise will happen and build controls that limit blast radius

Reality Check: Many legacy medical devices can’t run modern security agents. That’s why network controls and segmentation matter even more.

Mistake #5: Not Having a Medical Device Incident Response Plan

The Problem: When a security incident involves medical devices, your organization’s standard IR playbook falls apart. IT wants to isolate and patch. Clinical needs devices online for patient care. Nobody has authority to make the call.

Why It Happens: Most incident response plans were written by IT security teams who’ve never worked with medical devices. The clinical impact, regulatory requirements, and operational constraints aren’t considered.

The Fix:

• Create a medical device-specific IR playbook that addresses clinical risk alongside security risk
• Define decision authority: Who can authorize taking a critical device offline? What’s the escalation path?
• Establish clinical workarounds: For every critical device type, document the backup plan if it’s compromised
• Run tabletop exercises with Clinical Engineering, IT Security, Risk Management, and clinical leadership
• Pre-stage containment tools: Have network isolation scripts, forensic collection tools, and communication templates ready

Critical Element: Your IR plan needs a clinical risk assessment framework. Not every compromised device requires immediate isolation if it means stopping patient care.

Moving Forward

These five mistakes share a common thread: they happen when MDI teams are forced to handle security responsibilities without adequate training, tools, or organizational support.

The fixes I’ve outlined are practical starting points, but they’re not a complete security program. They’re the essential controls that will reduce your risk significantly while being achievable with limited resources.

Start with one: Pick the mistake your team is most guilty of and implement the fix this quarter. Build momentum with quick wins, document your successes, and use them to advocate for more resources.

Security isn’t about perfection. It’s about making incremental improvements that shift the risk calculation in your favor. Your patients, your organization, and your own peace of mind depend on getting this right.

What security challenge is your MDI team facing? Drop a comment below or reach out directly. I’d love to hear what’s working (and what’s not) in your environment.