Healthcare access security is moving beyond perimeter trust

At a glance

What this is: This is an analysis of why legacy VPN-centric access models no longer fit modern healthcare environments and what a Zero Trust approach changes.

Why it matters: It matters because healthcare security teams must protect PHI, maintain clinical uptime, and prove access control under HIPAA and HITECH while supporting clinicians, vendors, and distributed systems.

👉 Read Appgate's analysis of healthcare access security beyond the perimeter

Context

Healthcare access security now has to govern distributed clinical work, third-party maintenance, and remote patient care instead of assuming a fixed network perimeter. In that environment, VPN-centric access models create broad trust after authentication, which is a poor fit for least-privilege control and audit-ready identity governance.

The primary issue is not simply remote access. It is that legacy access architecture grants network reach instead of narrowly scoped system access, so one compromised account can travel farther than it should across EHR, imaging, telehealth, and vendor-connected systems.

Key questions

Q: How should healthcare organisations reduce risk from vendor remote access?

A: Start by treating vendor access as a governed non-human identity lifecycle, not a one-time network exception. Scope each account to a specific system or task, set expiry on access, review it regularly, and revoke it when the support relationship ends. Broad VPN access should be replaced with narrowly authorised application access.

Q: Why do VPN-centric access models create audit problems in healthcare?

A: Because they usually prove only that someone connected to the network, not what they were allowed to reach inside it. Auditors and investigators need evidence tied to specific applications, sessions, and policy decisions. Without that, healthcare organisations struggle to demonstrate least privilege and reproduce access history during an incident review.

Q: What breaks when broad network access is used for clinical and vendor users?

A: Least privilege breaks first, because users receive far more reach than their role requires. After that, lateral movement becomes easier if credentials are compromised, and incident containment becomes harder because the original access boundary was too wide. In healthcare, that can translate into patient care disruption as well as data exposure.

Q: Who is accountable when third-party access is overextended in a hospital?

A: The accountable teams are identity governance, security architecture, and the business owners who approve access, because they define the scope and lifecycle of external identities. HIPAA and HITECH expectations make it hard to defend broad, persistent access that is not tied to a documented need and an auditable control set.

Technical breakdown

Why VPN-centric access creates excessive network trust

Traditional VPNs treat successful authentication as a gateway to broad network access. That design made sense when users, applications, and data lived inside a stable perimeter. In modern healthcare, the same model exposes too much of the environment once credentials are accepted. A clinician, contractor, or vendor often receives network reach that is far wider than the task requires, which increases blast radius if an account is compromised. The control problem is not authentication itself but the assumption that network location or a single login event is enough to establish trust across many systems.

Practical implication: Replace network-wide trust with policy decisions tied to identity, device, and application scope.

How third-party access expands healthcare attack surface

Healthcare vendors often need legitimate access for device support, billing, imaging, and platform maintenance. The security challenge is that external access tends to persist longer and spread wider than the work actually requires. When permissions are not tightly scoped, vendor credentials become attractive for attackers because they can open paths into systems that are hard to monitor from the outside. This is an NHI governance problem as much as a network problem, because the external account, token, or session is a non-human identity with a lifecycle that must be controlled.

Practical implication: Treat every external account as a governed NHI with explicit scope, expiry, and offboarding.

What identity-driven access changes for audit and compliance

Identity-driven access control replaces implicit network trust with decisions based on who or what is requesting access, from where, on which device, and for which resource. That model is better aligned to HIPAA and HITECH expectations because it can produce clearer evidence of access scope and timing. It also supports Zero Trust principles by limiting access to the minimum required resource set instead of opening broad tunnels. For healthcare, the technical value is not just tighter security. It is also better operational proof that access was controlled in a way auditors and investigators can follow.

Practical implication: Centralise access policies so audit evidence reflects specific system-level entitlements, not just VPN sessions.

Threat narrative

Attacker objective: The attacker aims to pivot from one foothold into broader clinical access, then disrupt operations or exfiltrate protected health information.

1. Entry occurs when a user, contractor, or vendor authenticates through a VPN or gateway and receives broader network access than the task requires.
2. Escalation happens when compromised credentials or over-permissioned vendor access are used to move laterally across clinical and supporting systems.
3. Impact follows when attackers reach EHR, imaging, telehealth, or operational systems and can disrupt care or expose protected health information.

Breaches seen in the wild

• JetBrains Marketplace AI Plugin Campaign — 15 malicious JetBrains Marketplace plugins steal AI API keys from 70,000+ developers via supply chain attack.
• Code Formatting Tools Credential Leaks — Widely used code formatting tools cause massive credential and secrets leaks in enterprise environments.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Broad network trust is the wrong governance model for healthcare access. Healthcare environments now combine remote clinicians, external vendors, cloud services, and connected medical devices. A VPN that opens the network after login does not distinguish between a one-system task and a broad trust relationship. That is a governance failure, not just a configuration issue. Practitioners should stop treating network admission as equivalent to access authorization.

Third-party access without lifecycle discipline is hidden NHI risk in healthcare. Vendor credentials, service accounts, and support sessions behave like non-human identities and must be governed as such. When those identities are granted wide reach, they create latent pathways that outlive the immediate support need. The practitioner conclusion is straightforward: scope, expiry, and offboarding need to be explicit for every external access path.

Identity blast radius is now a clinical resilience issue, not only a security issue. If one compromised account can reach EHR, imaging, and operational services, the impact is measured in patient care disruption as well as data loss. This is where Zero Trust and least privilege become operational controls for continuity, not just compliance language. Teams should reduce the reachable surface of every identity before an incident proves why.

Healthcare access modernisation is really about replacing implicit trust with verifiable trust signals. Identity, device posture, and resource context need to drive access decisions continuously because static network trust cannot reflect the pace of distributed care. That aligns security with auditability and patient safety at the same time. The practitioner takeaway is to build access around evidence, not perimeter location.

From our research:

• 43% of security professionals are concerned about AI systems learning and reproducing sensitive information patterns from codebases, according to The State of Secrets in AppSec.
• Only 44% of developers are reported to follow security best practices for secrets management, which widens the control gap between policy and implementation.
• Use Ultimate Guide to NHIs , Lifecycle Processes for Managing NHIs to extend the same lifecycle discipline to vendor accounts, service identities, and AI-adjacent access paths.

What this signals

Identity blast radius is becoming the practical measure of healthcare access risk. When a single remote access method can expose clinical, vendor, and operational systems, security teams need to measure how far an identity can move, not just whether it can connect. That pushes healthcare programmes toward policy-driven access boundaries and away from network-based trust, with NIST Cybersecurity Framework 2.0 providing the governance language for that shift.

The next governance step is to make third-party access observable as a lifecycle, not a static exception. When vendor connectivity is left outside normal identity review cycles, it accumulates silently until an audit or incident forces the issue, which is why access recertification and offboarding need to be part of routine operations.

For practitioners

• Inventory every external access path Map vendors, contractors, biomedical providers, and managed service accounts to the exact systems they can reach, then remove any broad network access that is not tied to a named business function.
• Scope access to the application, not the network Replace generic VPN reach with policies that permit only the specific EHR, imaging, telehealth, or device-management resources required for each role and support task.
• Set expiry and offboarding on every vendor identity Give third-party access a defined end date, enforce recertification, and revoke credentials immediately when the support relationship or maintenance window ends.
• Preserve audit evidence at the identity layer Log who accessed which system, from which context, and under which policy decision so investigations can reconstruct access without relying on VPN connection history alone.
• Test clinical resilience under denied access conditions Validate that restrictive policies still allow care teams to reach critical applications quickly, because access controls that impede patient care will be bypassed in practice.

Key takeaways

• Healthcare access security fails when VPN connectivity is treated as proof of trust rather than a request for narrowly scoped authorization.
• Third-party access is a major risk path because external identities often persist longer and reach farther than the work requires.
• Identity-driven access control improves both compliance and clinical resilience by limiting blast radius and making access evidence easier to audit.

Key terms

• Identity-driven access control: Identity-driven access control authorises access based on the identity, device, context, and target resource instead of assuming trust from network location. In healthcare, it is the practical way to narrow access for clinicians, vendors, and remote support without opening the whole environment.
• Identity blast radius: Identity blast radius is the amount of systems, data, and operational capability a compromised identity can reach. The smaller the blast radius, the less damage a stolen credential, token, or session can cause across clinical and supporting services.
• Third-party access lifecycle: Third-party access lifecycle is the governed sequence of granting, reviewing, expiring, and revoking external access. It applies to vendor accounts, support sessions, and service credentials, and it is essential when non-employees need temporary reach into regulated environments.

What's in the full article

Appgate's full article covers the operational detail this post intentionally leaves for the source:

• A healthcare-specific breakdown of how VPN-centric access models create over-permissioned pathways across clinical environments.
• Practical examples of identity-driven access controls for clinicians, vendors, and distributed care settings.
• Appgate's own positioning on how ZTNA can be applied to EHR, imaging, telehealth, and remote maintenance workflows.
• Implementation-oriented benefits for audit visibility, third-party connectivity, and performance in care delivery.

👉 The full Appgate article covers distributed care access, third-party exposure, and identity-driven control options.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.