Cybersecurity Supply Chain Risk Management Plan Template

Standard Operating Procedure: Cybersecurity Supply Chain Risk Management (C-SCRM)

1. Document Control Block

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2. Executive Summary & Scope

This SOP defines the institutional framework for identifying, assessing, and mitigating risks associated with third-party vendors, software components, and hardware providers. The scope encompasses the entire lifecycle of supply chain interactions, from initial procurement to decommissioning. This document aligns with NIST SP 800-161 Rev. 1 and ISO/IEC 27036 standards.

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3. Prerequisites & Tool Requirements

• Access Requirements: Read/Write access to the Enterprise Risk Management (ERM) dashboard and Vendor Management System (VMS).
• Tooling:
  • Software Bill of Materials (SBOM) Analyzer: (e.g., Dependency-Track or Snyk).
  • GRC Platform: (e.g., OneTrust, Archer, or equivalent).
  • Threat Intelligence Feed: (e.g., Recorded Future or FS-ISAC).
• Certifications: Personnel conducting assessments must hold CTPRP (Certified Third-Party Risk Professional) or equivalent certifications.

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4. Roles & Responsibilities (RACI Matrix)

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5. Step-by-Step Operational Procedure

Phase 1: Identification & Classification

• Categorize vendor based on data access levels (Tier 1: Critical/Systemic, Tier 2: Operational, Tier 3: Commodities).
• Ingest initial vendor security documentation (SOC 2 Type II, ISO 27001 certificate).
• Determine criticality of software components via SBOM ingestion.

Phase 2: Risk Assessment

• Execute automated questionnaire (SIG Lite/Full) via GRC portal.
• Cross-reference vendor domain names against Threat Intelligence feeds for active breaches.
• Evaluate "Fourth-Party" dependencies (sub-processors) reported by the primary vendor.

Phase 3: Mitigation & Remediation

• Define "Security Requirements Addendum" (SRA) for high-risk findings.
• Negotiate "Right to Audit" and "Incident Notification" clauses in the Master Service Agreement (MSA).
• Implement compensating controls for non-remediable legacy systems.

Phase 4: Continuous Monitoring

• Perform quarterly automated vulnerability scans on all licensed software.
• Review annual vendor SOC/audit bridge letters for integrity.

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6. Quality Assurance & Verification Criteria

• Tolerance Thresholds: No "Critical" vulnerabilities (CVSS > 9.0) allowed in production-deployed third-party code for > 48 hours.
• Acceptance Benchmarks:
  • 100% of Tier 1 vendors must have a valid, unexpired SOC 2 report on file.
  • 100% of new vendors must pass the pre-onboarding security review before purchase order issuance.
• Audit Trail: All risk scoring adjustments must be documented with a timestamped justification.

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7. Practical Troubleshooting Scenarios

Scenario A: Vendor Refusal of Audit

• Condition: Vendor refuses to provide proof of remediation for a critical high-risk vulnerability.
• Corrective Action: Immediate elevation to CISO. Invoke "Right to Terminate" clause in MSA. Initiate "Isolation Protocol" to sandbox the vendor's application within the network until remediation is verified.

Scenario B: Unexpected SBOM Component Found

• Condition: Scanning reveals a hidden, unauthorized open-source library with a known CVE (Log4j equivalent).
• Corrective Action: Issue a "Security Stop-Ship" order for that component. Require the vendor to provide a patch or a temporary configuration workaround within 24 hours.

Scenario C: Vendor Acquisition

• Condition: The vendor is acquired by a third party with lower security standards.
• Corrective Action: Initiate a "Triggered Assessment" within 5 business days of public announcement. Re-evaluate contract terms if the new parent company fails to meet Template Registry’s minimum baseline.

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Julian Vance Chief Operations Architect Template Registry