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07/06/2026 8:37 pm
TL;DR: Industrial remote access is now being treated as a foundational control for OT because shared vendor accounts, hardcoded credentials, VPN overreach, and limited auditability create safety and compliance risk, according to Industrial Cyber’s analysis of SSH Communications Security. The governance challenge is no longer connectivity alone, but identity-bound, fully auditable access that does not widen the attack surface.
NHIMG editorial — based on content published by SSH Communications Security: industrial secure remote access, OT governance, and Zero Trust access controls
Questions worth separating out
Q: How should security teams govern remote vendor access in OT environments?
A: Security teams should bind every remote vendor session to a named identity, a specific task, and a revocation path.
Q: Why do shared accounts create such a large risk in industrial remote access?
A: Shared accounts break attribution, make least privilege impossible to enforce cleanly, and weaken incident response because no one can tell which operator did what.
Q: What breaks when VPN-based remote access is the default for OT?
A: VPN-based access often grants broader network reach than the task requires, which expands the attack surface and makes lateral movement easier.
Practitioner guidance
- Inventory every third-party OT access path Map shared vendor accounts, VPN routes, and emergency access channels to the exact OT assets and protocols they can reach.
- Move contractor access to identity-bound sessions Use per-user access with short-lived credentials so maintenance and support work can be approved, monitored, and revoked without relying on persistent authorisations.
- Segment legacy OT protocols from general network access Treat Modbus TCP, OPC UA, and other industrial protocols as distinct control surfaces.
What's in the full report
SSH Communications Security's full article covers the operational detail this post intentionally leaves for the source:
- How PrivX OT is positioned for passwordless, keyless, just-in-time industrial access in legacy and modern environments.
- How NQX is described for quantum-safe, high-speed network encryption across site-to-site connectivity.
- Which OT protocol isolation and micro-segmentation capabilities the vendor highlights for Modbus TCP, OPC UA, and fixed firmware systems.
- How the article frames PAM integration, secrets vaulting, and credential-less authentication in industrial access workflows.
Industrial secure remote access and OT identity governance gaps?
Explore further
08/06/2026 8:14 am
Industrial remote access is now an identity problem, not a connectivity problem. The core failure is treating remote links as network plumbing while the real risk sits in who can reach what, under what identity, and for how long. Shared accounts, VPN sprawl, and weak attribution all turn maintenance access into an uncontrolled access path. Practitioners should treat OT remote access as a governed identity workflow rather than a transport feature.
A few things that frame the scale:
- 85% of organisations lack full visibility into third-party vendors connected via OAuth apps, with 38% having no or low visibility and a further 47% only partial visibility, according to The State of Non-Human Identity Security.
- Only 1.5 out of 10 organisations are highly confident in their ability to secure NHIs, compared with nearly 1 in 4 for securing human identities, according to The State of Non-Human Identity Security.
A question worth separating out:
Q: How should OT teams balance emergency response with Zero Trust controls?
A: OT teams should allow emergency access, but only through identity-bound, time-limited, fully logged sessions that can be approved and terminated without exposing the whole environment. Zero Trust in industrial settings is about constraining scope while preserving operational continuity. If emergency access cannot be audited, it is not governed.
👉 Read our full editorial: Industrial secure remote access is becoming an identity control
