A connected vehicle is a car or mobility platform that uses network connectivity to exchange data and enable digital services. It can support navigation, remote access, payments, and automated interactions with other systems. That connectivity creates useful new experiences, but it also introduces identity, data, and safety risks that must be managed continuously.
Expanded Definition
Connected vehicle refers to a vehicle platform that exchanges data with external systems through embedded telematics, mobile networks, Bluetooth, Wi-Fi, cloud services, or roadside infrastructure. In security terms, the phrase covers both consumer-facing functions such as remote unlocking and app-based telemetry, and machine-to-machine services such as fleet management, diagnostics, over-the-air updates, and payment or toll integrations.
The boundary matters. A vehicle can be “connected” without being highly autonomous, and a software-defined vehicle can still rely on tightly separated safety domains. Guidance versus consensus is not fully settled across the industry on where infotainment ends and safety-relevant control begins, so practitioners should treat the trust boundary as an engineering decision, not a marketing label. The common misunderstanding is to assume every connected service is equally privileged; in practice, different data paths often deserve different authentication, authorization, and fail-safe treatment.
Examples and Use Cases
Connected vehicle capabilities usually appear as a set of bounded services rather than one monolithic feature. Typical examples include:
- Remote lock, unlock, start, and vehicle status checks through a mobile app.
- Fleet telemetry that streams location, diagnostics, fuel, or battery data to an operations console.
- Over-the-air software or firmware updates that depend on signed packages and update orchestration.
- In-vehicle payments, tolling, charging, or parking integrations that exchange tokens with external providers.
- Vehicle-to-cloud or vehicle-to-infrastructure messaging used for navigation, traffic, or safety alerts.
These uses often share a trade-off: the more direct the external integration, the more carefully the vehicle must separate convenience features from functions that affect safety or availability. That is why many programs treat telematics, app access, and update pathways as distinct control surfaces even when they are delivered through the same branded service.
Security Implications
Connected vehicles expand the attack surface because they combine personal data, remote access, third-party integrations, and operational control in a system that is often expected to remain available for years. Mismanaged connectivity can expose location history, account data, or service credentials, and it can also create pathways for unauthorised commands or tampered updates if trust is weak at the edge, in the app, or in the backend.
Failure conditions are often cumulative. Weak pairing, poor token handling, insecure APIs, brittle update validation, or inconsistent segmentation can turn a convenience feature into a persistence point or a privacy issue. The practical symptom is usually not a single dramatic failure but a growing mismatch between who can reach the service, what they can change, and what the vehicle can safely tolerate. The operational consequence can be account takeover, service disruption, degraded telemetry integrity, or loss of confidence in the platform’s digital controls.
Domain and Governance Relevance
connected vehicle security sits at the intersection of automotive cybersecurity, cloud service governance, and identity assurance. The vehicle is no longer just an endpoint; it is a distributed trust environment with users, mobile apps, service accounts, APIs, update infrastructure, and often non-human identities supporting the backend. That makes ownership questions especially important: one team may manage the app, another the telemetry pipeline, and another the update service, but the risk is shared across all of them.
For identity-centric programs, the key change is that access is not only about driver credentials. Machine identities, certificates, tokens, and service permissions often mediate the most sensitive functions. Where those controls are weak, the vehicle’s connected features can outlive their intended scope, which creates governance issues around revocation, lifecycle management, and trust boundaries. OWASP Non-Human Identity Top 10 is useful here because many connected vehicle risks depend on how non-human credentials are issued, used, and retired.
In practice, connected vehicle governance works best when organisations treat external connectivity as a continuing control problem rather than a one-time product feature decision.
Risk and Threat Considerations
Connected vehicles create a material risk of remote abuse, account compromise, data exposure, and service disruption because they rely on externally reachable APIs, mobile apps, and backend trust relationships. The risk grows when the same digital pathway supports both convenience features and functions with higher safety or operational impact.
Failure mechanism: Attackers or abusive users can exploit weak authentication, token leakage, insecure pairing, broken API authorization, or flawed update trust to issue unauthorised commands, harvest telemetry, or maintain access through a trusted service path.
Impact: The result can be loss of privacy, unauthorised vehicle actions, disrupted fleet operations, tampered software delivery, or a broader breakdown in confidence that connected services are safe to use.
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 CIS Controls v8 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 — Inventory and Ownership | Connected vehicles depend on service and machine identities across apps, APIs, and updates. |
| NHI-02 — Authentication and Secrets | Remote commands and telemetry hinge on tokens, certificates, and API keys. | |
| NHI-07 — Lifecycle and Revocation | Connected services persist over long vehicle lifecycles and need clean offboarding. | |
| Recommendation — Inventory every vehicle-facing machine identity and assign clear ownership for issuance, rotation, and retirement. Protect vehicle access paths with strong authentication and secret handling for all non-human identities. Revoke stale vehicle service credentials promptly when apps, vendors, or update channels are retired. | ||
| CIS Controls v8 | 5 — Account Management | Connected vehicle access relies on user and service accounts with defined privileges. |
| 6 — Access Control Management | Remote functions require tight authorization boundaries and least privilege. | |
| 8 — Audit Log Management | Vehicle commands, updates, and telemetry changes need traceable records. | |
| Recommendation — Restrict and review connected-vehicle accounts so only approved users and services retain access. Enforce least privilege for remote vehicle functions and segment high-impact actions from routine access. Log connected-vehicle access and command activity so unusual remote actions can be investigated quickly. | ||
| NIST CSF 2.0 | PR.AC — Access Control | Connected vehicle services depend on trustworthy authentication and authorization decisions. |
| PR.DS — Data Security | Vehicle telemetry and personal data move across apps, cloud services, and partners. | |
| PR.PT — Protective Technology | Connected vehicle update and command pathways need technical safeguards against abuse. | |
| Recommendation — Apply access controls that separate driver convenience functions from safety-relevant vehicle actions. Protect connected-vehicle data in transit and at rest across all external service integrations. Use technical safeguards that validate connected-vehicle commands and trusted software updates. | ||
| MITRE ATT&CK | T1078 — Valid Accounts | Stolen app or service credentials can unlock remote vehicle features. |
| Recommendation — Map compromised connected-vehicle accounts to T1078 and monitor for misuse of legitimate access. | ||
Practitioner Guidance
Why practitioners should care: Connected vehicle programmes need clear control ownership because the risk is distributed across automotive systems, cloud services, mobile interfaces, and third-party dependencies. If those layers are managed separately, the weakest trust boundary often becomes the real point of exposure.
Common misunderstanding: A frequent error is to treat the mobile app or infotainment layer as the only security concern. In reality, backend credentials, service-to-service permissions, update channels, and revocation processes often matter more than the user interface itself.
Practitioner takeaway: Evaluate connected vehicle features as lifecycle-managed trust services, not as static product functions.
Related resources from NHI Mgmt Group
- How should automotive teams govern machine identities across connected vehicle environments?
- How should security teams govern OTA update approvals in connected vehicle environments?
- Who is accountable for certificate lifecycle in connected vehicle security?
- Which compliance frameworks matter for connected vehicle PKI?
