Why do VPN-style access models create risk in healthcare?

VPN-style models usually trust a user once they are inside the network, which gives them broad reach that is too coarse for healthcare. That increases lateral movement risk and makes it harder to distinguish clinicians, vendors, and devices. Healthcare access needs precise authorization, not blanket internal trust.

Why This Matters for Security Teams

VPN-style access models create risk in healthcare because they treat network location as a proxy for trust, but clinical environments depend on far more than whether a connection is “inside.” A nurse, a contractor, a biomedical device, and a billing workflow may all land on the same trusted segment while needing sharply different privileges. That gap undermines least privilege and makes credential misuse much harder to spot.

This matters most where shared infrastructure and third-party access are normal. Once a VPN session is established, broad internal reach can expose EHR systems, imaging platforms, and administrative tools to lateral movement if an account or endpoint is compromised. NIST’s NIST Cybersecurity Framework 2.0 emphasizes access control, monitoring, and resilience, but network admission alone does not satisfy those outcomes in a healthcare setting.

NHIMG’s Ultimate Guide to NHIs — Why NHI Security Matters Now notes that 90% of IT leaders say properly managing NHIs is essential for zero trust, which is directly relevant when healthcare VPNs also carry service accounts, API tokens, and device credentials. In practice, many security teams discover the real exposure only after an internal account is abused and the attacker has already moved well beyond the first login.

How It Works in Practice

The practical problem is that a VPN usually grants a session, not a specific business intent. Once connected, access often depends on coarse subnet rules or legacy ACLs, which do not distinguish between a clinician checking a patient chart and a vendor maintaining a lab interface. That is why current guidance increasingly favors context-aware authorization, just-in-time access, and workload identity over blanket network trust.

For healthcare, that means tying access to identity, device posture, role, location, and task context at the moment of request. A remote specialist may need time-bound access to one application, while a diagnostic appliance may need an ephemeral token to call a single API. This is where OWASP Non-Human Identity Top 10 and NHIMG’s 52 NHI Breaches Analysis are useful: they show how long-lived secrets, overbroad privilege, and weak offboarding become breach multipliers, especially when internal trust is assumed.

• Use MFA and device checks to establish who or what is connecting, not just where it connects from.
• Issue short-lived credentials per task instead of reusing static VPN-era access paths.
• Apply policy at request time so a session cannot automatically reach unrelated systems.
• Separate human access, vendor access, and machine-to-machine access into different control paths.

For operational resilience, align these controls with logging and continuous verification so anomalous tool-chaining or lateral movement is visible early. These controls tend to break down in flat networks that still rely on shared admin groups, legacy PACS or device segments, and third-party tunnels that were never redesigned for least privilege.

Common Variations and Edge Cases

Tighter access control often increases operational overhead, requiring organisations to balance clinician workflow speed against the security benefit of narrower reach. That tradeoff is real in emergency care, on-call support, and biomedical maintenance, where static approvals can slow response if not designed carefully.

Best practice is evolving toward segmented access models rather than universal VPN retirement. Some hospitals keep VPNs for transport security but remove them from the trust decision, then enforce application-level authorization, short TTLs, and step-up checks for sensitive systems. Others move privileged users to ZTNA or bastion-mediated access while leaving ordinary staff on managed device controls. There is no universal standard for this yet, but the direction is consistent: network entry should not imply broad application trust.

NHIMG’s Ultimate Guide to NHIs highlights how excessive privilege and poor rotation worsen exposure, which is especially important when healthcare vendors, scripts, and integration accounts are delivered through the same remote-access path. The governance challenge becomes harder when a single tunnel serves humans and machines, because revocation, audit, and exception handling all get blurred. In those mixed environments, VPN-style access often survives by convenience even after better controls exist elsewhere.

Related resources from NHI Mgmt Group

• When does JIT access create more risk than it reduces?
• Why do VPN-based remote access models still create privilege risk?
• What do teams get wrong when they keep VPN-style access for regulated systems?
• Why do non-human identities create more audit risk than human accounts?