Because they depend on continuous machine-to-machine trust. Every telemetry feed, partner integration, update service, and analytics pipeline introduces non-human identities that can be over-scoped, forgotten, or reused. That raises the chance that access survives beyond its intended purpose and becomes a standing risk across the mobility stack.
Why This Matters for Security Teams
Connected vehicle ecosystems are identity-heavy environments disguised as product platforms. A traditional product may expose a limited set of support accounts, but a vehicle program typically spans firmware update services, telematics brokers, fleet APIs, cloud analytics, supplier portals, and service-tool access. Each of those touchpoints can introduce a non-human identity, and each identity needs lifecycle ownership, scoping, rotation, logging, and revocation. Without that discipline, access persists long after the operational need has changed.
The risk is not only unauthorized access. Identity sprawl in connected mobility can also create weak trust boundaries between manufacturing, delivery, maintenance, and post-sale operations. That means a credential used for diagnostics may end up able to reach data pipelines, or a partner token may still be accepted after a contract change. NIST Cybersecurity Framework 2.0 emphasizes governance, asset visibility, and continuous risk management, which maps closely to this problem because the identity surface is now part of the operational attack surface, not just an IT concern. In practice, many security teams encounter vehicle identity failures only after a supplier integration, over-permissive API token, or stale certificate has already been abused.
How It Works in Practice
Connected vehicle ecosystems create identity risk because they rely on long-lived machine trust across many organisations and many operational states. A single vehicle may authenticate to OEM services, while a factory line, mobile app, dealer tool, roadside provider, and third-party analytics platform each maintain separate credentials and trust relationships. This is where Non-Human Identity governance becomes critical: secrets, certificates, service accounts, API keys, and workload identities must be treated as production identities with owners and expiry rules.
Good practice is to inventory every system that can issue, consume, or validate identities, then classify each by purpose and blast radius. From there, teams should:
- bind each identity to a named owner and business function;
- scope permissions to a single workload, vehicle family, or partner use case;
- rotate secrets and certificates automatically where possible;
- disable dormant partner access after contracts, recalls, or service changes;
- log every authentication and token exchange into SIEM for monitoring and investigation.
Attackers often exploit the gaps between engineering, supplier management, and operations, so identity evidence should be reviewed alongside software bills of materials, update channels, and API inventories. MITRE ATT&CK is useful here because many compromises begin with credential misuse, lateral movement, or abuse of valid accounts rather than a dramatic perimeter breach. Current guidance suggests the strongest programs also connect this work to zero trust principles, so that trust in one service does not automatically extend to adjacent vehicle or cloud functions. These controls tend to break down when multiple suppliers manage overlapping certificate authorities and no single team owns revocation across the full mobility stack.
Common Variations and Edge Cases
Tighter identity control often increases operational overhead, requiring organisations to balance security assurance against deployment speed, partner friction, and field-service reliability. That tradeoff is especially visible in connected vehicles because uptime and safety requirements can make teams reluctant to shorten token lifetimes or enforce frequent re-authentication.
Best practice is evolving for edge environments, offline service tools, and over-the-air update workflows, because there is no universal standard for how every identity should behave when vehicles lose connectivity. Some identities need to survive intermittent links, while others should be deliberately short-lived. The key is to distinguish operational continuity from convenience: a diagnostic session may need a temporary exception, but a supplier integration should not retain broad access just because it is hard to re-provision.
This is also where identity intersects with product safety and privacy. A telemetry identity may expose location or driver data, so overbroad access becomes both a security issue and a data governance issue. For that reason, teams should align access reviews with NIST Cybersecurity Framework 2.0 and extend monitoring to partner and service identities that touch vehicle data. The hardest cases are mixed estates where legacy vehicles, modern cloud services, and third-party maintenance platforms all use different trust models, because revocation and traceability become inconsistent across the ecosystem.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and MITRE ATT&CK address the attack and risk surface, while NIST CSF 2.0, NIST Zero Trust (SP 800-207) and NIST SP 800-63 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.OC-01 | Connected vehicle identity risk spans suppliers, services, and ownership boundaries. |
| NIST Zero Trust (SP 800-207) | SP 5 | Zero trust limits implicit trust between vehicle, cloud, and partner services. |
| OWASP Non-Human Identity Top 10 | NHI-04 | Over-scoped and forgotten machine identities are the core risk in this question. |
| NIST SP 800-63 | IAL2 | Identity assurance principles help when people approve or recover machine access. |
| MITRE ATT&CK | T1078 | Valid account abuse is a likely path when partner and service credentials persist. |
Use strong identity proofing and recovery checks for admins and operators managing vehicle trust.
Related resources from NHI Mgmt Group
- Why do hybrid identity environments create more audit and security risk than single-directory setups?
- Why do cloud workloads create more identity risk than traditional servers?
- Why do cloud environments create more secrets risk than traditional datacenters?
- Why do AI development environments create more security risk than traditional dev environments?
