TL;DR: Manufacturing cybersecurity budgets are shifting from network protection to secure IT and OT connectivity because broad VPN access, inconsistent permissions and legacy systems can turn one compromised account or vendor connection into downtime, according to CyberFOX. In manufacturing, the real control problem is reducing blast radius across production workflows, not simply adding more perimeter tooling.
At a glance
What this is: This article argues that manufacturing security budgets are moving toward safer IT/OT connectivity because broad access paths can disrupt production, maintenance and vendor-supported operations.
Why it matters: For IAM, PAM and NHI practitioners, it reinforces that manufacturing risk is increasingly governed by how users, vendors and devices are granted, limited and removed from access to production-linked systems.
Context
Manufacturing cybersecurity now sits at the intersection of uptime, vendor access and production continuity, not just office network protection. The core problem is that plants, cloud tools and legacy OT systems are increasingly connected without being designed for the same access model, so broad connectivity can create outsized operational risk.
In this environment, the identity layer becomes part of the production control plane. User, vendor and device access has to be limited to the exact systems needed for maintenance, monitoring or scheduling, which makes OT and ICS identity and access a practical governance issue rather than a purely technical one.
Key questions
Q: How should manufacturers limit remote access without slowing maintenance work?
A: Manufacturers should replace broad connectivity with task-scoped access that is tied to the specific systems, devices and roles needed for maintenance. The goal is to let work continue without exposing unrelated production assets. That usually means identity-based policy, device checks and fast removal of access when the job ends.
Q: Why do broad VPNs create more manufacturing downtime risk?
A: Broad VPNs increase downtime risk because they let one compromised account or vendor session reach too many systems at once. If access is not constrained to a specific workflow, a single incident can affect maintenance, scheduling and plant operations. The issue is blast radius, not just remote connectivity.
Q: What breaks when vendor remote access in OT is not tightly controlled?
A: Uncontrolled vendor access turns maintenance into an open-ended production risk. Without session-scoped approval, identity binding, and auditability, external users can reach sensitive assets longer than needed and create exposure that is difficult to detect, contain, or prove after the fact.
Q: When should manufacturing teams prioritise zero trust over legacy remote access models?
A: Manufacturing teams should prioritise zero trust when remote support, cloud tools and plant systems are already interconnected enough that one connection can affect production. At that point, broad trust is no longer efficient, it is risky. Zero trust becomes the better fit because it narrows access by identity, device and session.
Technical breakdown
Why broad VPN access breaks manufacturing segmentation
Traditional VPNs create a single trust tunnel into environments that actually contain multiple security zones, systems and operational roles. In manufacturing, that means a remote technician who only needs a maintenance interface may inherit reach into unrelated plant or corporate resources. Segmentation works only when access is bound to the specific workflow, asset and identity in question. Without that, the network becomes the control surface instead of the access policy, and every exception expands the blast radius of a compromised connection. See the OT Security Guide. See the OT Security Guide.
Practical implication: replace network-wide tunnels with access paths that map to the minimum required production workflow.
How identity-based access limits risk across plants and vendors
Identity-based controls shift the decision from where a user connects to what that identity is allowed to reach. In manufacturing, that matters because access is often shared across plants, shifts, vendors and support teams, and manual approval chains quickly become unmanageable. Least privilege, device checks and role-specific policies reduce the chance that a vendor account or remote session can move from one production asset to another. This is especially important where operational systems, cloud services and maintenance portals overlap. See the Multi-Cloud Identity Guide. See the Multi-Cloud Identity Guide.
Practical implication: enforce role-bound access and device posture checks for every remote user, vendor and support workflow.
Why zero trust is becoming a production continuity control
Zero Trust Architecture assumes no connection is trusted by default, which fits manufacturing environments where access needs vary by site, asset and maintenance window. The value here is not abstract security posture but operational containment: if a credential, device or vendor session becomes risky, access can be narrowed or terminated without reworking the whole environment. That makes Zero Trust a continuity control as much as a security one, because it limits how far a failed account or connection can travel through production systems. See the OT Security Platform Buyer's Guide. See the OT Security Platform Buyer's Guide.
Practical implication: design access policies so a compromised session can be constrained without interrupting the whole plant.
Threat narrative
Attacker objective: The attacker or compromised user reaches production-adjacent systems broadly enough to create operational disruption, maintenance delay or wider plant impact.
- Entry occurs when a vendor, technician or remote user is given broad network reach through legacy VPN access rather than workflow-specific access.
- Credential abuse or compromise then allows that identity to reach systems beyond the intended maintenance or monitoring scope.
- Escalation happens when the same connection can touch production-linked systems, making containment harder and downtime more likely.
- Impact is delayed maintenance, disrupted scheduling, longer recovery and broader operational exposure across plants and connected workflows.
Breaches seen in the wild
- Sisense breach 2024: A credential in Sisense's GitLab reportedly opened S3 buckets of customer tokens, passwords and certificates; CISA urged a full reset.
- CISA Private-CISA GitHub leak 2026: A CISA contractor's public GitHub repo exposed AWS GovCloud admin keys, Artifactory credentials and plaintext passwords for six months.
Read and download The State of NHI & AI Agent Breach Report 2026, covering 200+ breaches impacting Non-Human Identities including AI Agents.
NHI Mgmt Group analysis
Manufacturing access governance is now an uptime problem, not just a security problem. The article shows that plants, vendors and remote technicians depend on access paths that can either preserve continuity or widen the blast radius of a compromise. In that sense, access policy has become part of production resilience. Practitioners should treat every remote connection as a governed operational dependency, not a convenience layer.
Broad remote connectivity creates a standing trust problem that traditional network controls cannot solve. VPNs, manual approvals and loose group-based access are too coarse for environments where one identity may support multiple plants, shifts and systems. The security issue is not simply that access exists, but that access is over-broad relative to the task. Manufacturing programmes need a narrower trust model that binds permissions to workflow, device and session conditions.
OT and ICS identity and access is the right lens for vendor and technician access because identity now determines production reach. The article makes clear that the production risk is no longer just equipment exposure, but who can reach which system, from where, and for how long. That is an identity governance problem with operational consequences. Practitioners should design controls around task-scoped access, not network membership.
Secure connectivity spending is becoming easier to justify when it is tied to containment, not tooling categories. The article's budget argument is strongest when framed as preventing delayed maintenance, missed shipments and emergency recovery work. That shifts the conversation from security spend to operational cost avoidance. For manufacturers, the next governance step is to measure access risk in downtime terms and fund controls that reduce the scope of any failed connection.
What this signals
Access governance is becoming a production engineering control. When remote maintenance, vendor support and plant connectivity converge, the security team is effectively managing how much of the factory any one identity can reach. That means budget decisions should be evaluated against containment, not just perimeter reduction.
Manufacturing programmes need a narrower trust model for OT-connected identities. The access boundary has to follow the task, the device and the session, because generic network access does not match how plants operate. Multi-cloud identity remains relevant here because the same governance logic applies when identity spans cloud services and operational workflows.
Zero Trust Network Access is most valuable when it prevents operational spillover. The strategic win is not abstract compliance, but limiting the consequences of a compromised vendor or technician session before it reaches production systems. That shifts remote access from a connectivity feature to a resilience control.
For practitioners
- Replace broad VPN reach with workflow-specific access Limit remote users, vendors and technicians to the exact production systems they need, rather than giving them general network presence.
- Bind access decisions to device and role context Require device checks and role-based policy enforcement before allowing access to maintenance, monitoring or vendor support systems.
- Map production-critical access paths before budgeting Identify which identities, vendors and systems can affect uptime so budget requests align to the most business-critical exposure points.
- Set removal triggers for temporary vendor access Define when maintenance, troubleshooting or support access should be revoked so short-term connectivity does not become permanent reach.
Key takeaways
- Manufacturing cybersecurity budgets are shifting because access control now affects uptime, maintenance speed and the scope of production disruption.
- Broad VPN reach and inconsistent permissions can turn one compromised connection into a plant-level operational problem.
- The strongest governance response is to fund task-scoped, identity-based access that reduces blast radius without blocking essential work.
Related NHI Mgmt Group resources: OT and ICS Identity and Access Guide · Multi-Cloud Identity Guide · OT Security Platform Buyer's Guide · Business Continuity and Disaster Recovery Guide
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
CSA Cloud Controls Matrix, NIST Zero Trust (SP 800-207), NIST CSF 2.0, CIS Controls v8 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CSA Cloud Controls Matrix | IAM — Identity and Access Management | The article is fundamentally about controlling who can reach connected manufacturing systems. |
| Recommendation — Apply IAM governance to constrain remote and vendor access to only the production resources each role needs. | ||
| NIST Zero Trust (SP 800-207) | Zero Trust Architecture — Zero Trust Architecture | The article argues for replacing broad trust paths with identity-bound access decisions. |
| Recommendation — Use zero trust principles to remove implicit network trust from manufacturing remote access. | ||
| NIST CSF 2.0 | PR.AA-05 — Access Permissions, Entitlements and Authorizations | Permission scope is the central control issue when manufacturing access spans plants, vendors and devices. |
| Recommendation — Review entitlements so each identity can reach only the systems required for its operational task. | ||
| CIS Controls v8 | CIS-5 — Account Management | Shared, vendor and temporary accounts must be governed tightly in manufacturing access models. |
| Recommendation — Centralise account lifecycle controls to remove unnecessary and lingering access to plant-linked systems. | ||
| NIST SP 800-53 Rev 5 | AC-6 — Least Privilege | Least privilege is the core principle behind limiting remote access to specific manufacturing workflows. |
| Recommendation — Enforce least privilege so remote and vendor identities cannot move beyond their approved production scope. | ||
Key terms
- Zero Trust Network: A Zero Trust Network is a network security approach that does not trust users, devices, or traffic by default. Every connection is continuously verified using identity, device posture, context, and policy before access is granted. It assumes breach, limits lateral movement, and treats network access as conditional rather than implicit.
- Operational Technology: Operational Technology is the hardware and software that monitors or controls physical processes such as manufacturing lines, utilities, and transportation systems. Unlike standard IT, OT prioritises uptime and safety, so identity controls must be precise enough to reduce risk without interrupting essential operations.
- Least Privilege: A security principle requiring that every identity, human or non-human, is granted only the minimum permissions necessary to perform its function. Least privilege is the single most effective control for reducing NHI blast radius.
- Identity-Aligned Access Policy: Identity-aligned access policy is a control model that grants or blocks access based on who or what is requesting it, along with the context of that request. It is more precise than static network rules because it can distinguish between ordinary use, privileged access, and high-risk workflows.
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Published by the NHIMG editorial team on October 22, 2026.
NHI Mgmt Group, the independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org