Vendor Risk Management for Parking Technology: Assessing Third-Party Security

Parking technology environments depend on an ecosystem of vendors — PARCS providers, LPR software companies, payment processors, cloud platform providers, and maintenance contractors. Each vendor relationship introduces security risk: the vendor has access to operational systems, may process sensitive data, and may have vulnerabilities that propagate into the parking operator’s environment.

Third-party risk management (TPRM) for parking technology involves systematically assessing, contractually managing, and continuously monitoring these vendor relationships to reduce the risk that a vendor becomes a pathway for security incidents or compliance failures.

Why Third-Party Risk Matters in Parking

The parking industry has experienced third-party incidents that illustrate the scope of the risk:

Remote access compromises: PARCS vendors and their technicians routinely access parking systems remotely for support, updates, and troubleshooting. If a vendor’s own systems are compromised, their remote access credentials can be used to reach their customers’ parking systems.

Payment processor breaches: The payment ecosystem is a consistent target for attackers. A breach at a payment service provider that handles parking transactions can expose cardholder data without any failure in the parking operator’s own systems.

Cloud platform vulnerabilities: Cloud-hosted parking management platforms depend on the security of their cloud provider and their own application security. Vulnerabilities in the platform affect all customers simultaneously.

Physical access contractors: Maintenance contractors, cash collection services, and cleaning crews have physical access to parking equipment. Physical access to unsecured equipment creates opportunities for skimmer installation and hardware tampering.

Vendor Risk Tiering

Not all vendors present equal risk. A tiering framework focuses effort proportionally:

Tier 1 — Critical: Vendors with direct access to cardholder data, operational OT systems, or a large volume of sensitive personal information

• PARCS platform providers (cloud-hosted)
• Payment processors and payment service providers
• LPR vendors that store plate data in their cloud
• Remote monitoring and management vendors

Tier 2 — High: Vendors with access to non-payment sensitive systems or operational significance

• Access control platform vendors
• CCTV and VMS vendors
• IT managed service providers with access to parking networks

Tier 3 — Medium: Vendors providing software or services with limited direct access to sensitive systems

• Analytics and reporting platform providers
• Mobile app platform providers
• Equipment hardware vendors (post-installation, no ongoing access)

Tier 4 — Low: Vendors with no access to systems or sensitive data

• Office supply vendors, landscaping, janitorial (without equipment access)

Due Diligence in Vendor Assessment

Security Documentation Requests

For Tier 1 and Tier 2 vendors, request and review:

SOC 2 Type II report: A SOC 2 Type II report (AICPA standard) assesses a service organization’s controls over security, availability, processing integrity, confidentiality, and privacy over a minimum 6-month period. Review the report itself, not just a summary — the description of controls, test procedures, and any qualified opinions or exceptions provide more information than a clean certificate.

Penetration test summary: Annual penetration tests of internet-facing systems are a minimum security practice. Request evidence of annual testing and a summary of findings and remediation. A vendor that has never conducted a penetration test, or that cannot share summary results, is a risk signal.

PCI DSS compliance status: For vendors that handle cardholder data, verify current PCI DSS compliance — Attestation of Compliance (AOC) for payment service providers, SAQ for others. PCI DSS non-compliance at a payment ecosystem vendor is a significant risk to the parking operator’s own compliance posture.

Vulnerability disclosure policy: A published vulnerability disclosure policy indicates a mature security posture. Ask how the vendor handles security vulnerabilities in their products — how quickly are critical patches developed and communicated?

Security Questionnaires

For vendors that cannot provide formal third-party assessments, a security questionnaire covering key domains provides a baseline assessment:

• Access control policies and MFA requirements
• Data encryption practices (at rest and in transit)
• Patch management and vulnerability management practices
• Incident response and breach notification procedures
• Business continuity and recovery capabilities
• Employee security training

Contract Security Requirements

Security requirements should be contractually required, not just hoped for. Key contract terms for parking technology vendors:

Data processing agreements: Required for any vendor that processes personal data (license plates, payment data, employee information). The DPA should specify the processing purpose, data categories, sub-processor restrictions, security requirements, and breach notification timeline.

Breach notification timeline: Contractually require notification within 24–72 hours of a confirmed or suspected breach affecting the parking operator’s data. This enables the operator to meet their own notification obligations to regulators and affected individuals.

Right to audit: The right to request security assessment reports, audit results, or conduct assessments of the vendor’s security posture. Vendors that refuse right-to-audit provisions may have something to hide.

Security baseline requirements: Minimum security controls that the vendor must maintain — MFA for remote access, encryption standards, patching timelines.

Incident response cooperation: Vendor obligation to cooperate with the parking operator’s incident response and forensic investigation in the event of a breach.

Ongoing Monitoring

Third-party risk assessment at contract initiation is a snapshot. Ongoing monitoring tracks changes in vendor risk over time:

Annual reassessment: At minimum, request updated SOC 2 reports, PCI attestations, and penetration test results annually.

Threat intelligence monitoring: Monitor security news sources and vendor security advisories for incidents affecting your technology vendors. A publicized breach at a parking technology vendor warrants immediate escalation and assessment of your specific exposure.

Access review: Periodically review what access your vendors have to your systems and revoke access for vendor staff who have left the company or no longer require it.

FAQ

What is the minimum acceptable security certification for a cloud-hosted PARCS vendor? SOC 2 Type II is the baseline expectation for cloud-hosted parking management platforms. ISO 27001 certification is equivalent and more common for international vendors. For vendors handling payment data, PCI DSS SAQ or ROC compliance is required. A vendor that has none of these certifications and cannot explain why not warrants significant caution for Tier 1 deployment.

How should parking operators handle vendor remote access security? Vendor remote access to parking systems should use a privileged access management (PAM) tool that provides time-limited, session-recorded access rather than permanent VPN credentials. At minimum, require MFA for all vendor remote access, log all sessions, and review access logs periodically. Disable vendor access between authorized support windows if the PAM tooling supports it.

What should parking operators do when a vendor’s SOC 2 report contains exceptions or qualified opinions? A qualified SOC 2 opinion or material exceptions in the report do not automatically disqualify a vendor. Evaluate the nature of the exception (a minor documentation gap is different from a fundamental control failure), the vendor’s remediation response, and whether the exception affects the controls most relevant to your use case. Ask the vendor to explain the exception and their remediation timeline.

Are parking operators liable for security incidents caused by their technology vendors? Parking operators retain liability for protecting data they collect and process, even when a vendor is the proximate cause of a breach. Contracts can allocate financial liability to vendors (indemnification provisions), but regulatory liability for breach notification and potential fines typically remains with the data controller (the parking operator). This is the primary reason vendor security requirements should be contractually specified rather than assumed.