Mortgage Moat
Security Knowledge Center

Third-Party & Supply Chain Security

Managing vendor risks, securing your supply chain, and protecting against threats that originate from trusted business partners and service providers

62%

Breaches Involve Third Parties

Ponemon Institute Study

$7.5M

Average Supply Chain Breach Cost

Including remediation & fines

98%

Organizations Use Third-Party Vendors

With access to sensitive data

Your Security Is Only as Strong as Your Weakest Vendor

Financial services firms rely on dozens of vendors—from loan origination systems to credit reporting agencies. Each vendor connection represents a potential entry point for attackers. Third-party risk management is no longer optional; it's a regulatory requirement and business necessity.

Third-Party Security Threats

Understanding how vendors and supply chain partners can become security vulnerabilities

Vendor Access Exploitation

Attackers compromise vendor systems to gain indirect access to your network and data through trusted connections.

  • Compromised credentials: Stolen vendor login information
  • Lateral movement: Using vendor access to reach your systems
  • Privileged access abuse: Excessive vendor permissions
  • Remote access vulnerabilities: Insecure vendor connections

Software Supply Chain Attacks

Malicious code injected into software updates, libraries, or applications from trusted vendors.

  • Compromised updates: Malware in legitimate software patches
  • Dependency attacks: Malicious third-party libraries
  • Build system compromise: Infected development pipelines
  • Backdoor insertion: Hidden access points in vendor code

Data Exposure Through Vendors

Sensitive customer and business data compromised due to inadequate vendor security practices.

  • Vendor data breaches: Third-party systems compromised
  • Insecure data handling: Poor vendor security practices
  • Unauthorized data sharing: Vendors misusing your data
  • Cloud misconfigurations: Exposed vendor storage systems

Service Provider Failures

Business disruption and data loss resulting from vendor outages, bankruptcies, or service failures.

  • Service outages: Critical vendor systems going offline
  • Vendor bankruptcy: Loss of access to essential services
  • Data recovery issues: Inability to retrieve your data
  • Cascading failures: One vendor affecting multiple services

Comprehensive Vendor Risk Management

A structured approach to identifying, assessing, and mitigating third-party risks

1

Vendor Inventory & Classification

Maintain a complete inventory of all third-party vendors with access to your systems or data, categorized by risk level.

Critical Vendors

Core systems, customer data access, financial processing

High-Risk Vendors

Sensitive data handling, network access, compliance impact

2

Due Diligence & Security Assessment

Evaluate vendor security posture before engagement and regularly throughout the relationship.

  • Security questionnaires (SIG, CAIQ)
  • SOC 2 Type II audit reports
  • ISO 27001 certifications
  • Penetration testing results
3

Contractual Security Requirements

Establish clear security obligations, liability terms, and incident response requirements in vendor contracts.

  • Data protection and encryption requirements
  • Breach notification timelines (24-48 hours)
  • Right to audit vendor security controls
  • Data deletion upon contract termination
4

Ongoing Monitoring & Reassessment

Continuously monitor vendor security posture and reassess risks based on changes in the relationship or threat landscape.

Annual Reviews

Full reassessment

Threat Intelligence

Monitor vendor breaches

Performance Metrics

Track security KPIs

5

Incident Response & Remediation

Establish clear procedures for responding to vendor security incidents and ensuring timely remediation.

Response Plan Includes:

Immediate vendor notification requirements
Access suspension procedures
Impact assessment protocols
Regulatory reporting obligations

Vendor Security Best Practices

Practical controls to minimize third-party risks

Least Privilege Access

Grant vendors only the minimum access necessary to perform their services

Multi-Factor Authentication

Require MFA for all vendor access to your systems and data

Activity Monitoring

Log and review all vendor activities within your environment

Network Segmentation

Isolate vendor access from critical systems and sensitive data

Data Encryption

Encrypt all data shared with or accessible by third-party vendors

Regular Audits

Conduct periodic security audits of high-risk vendor relationships

Regulatory Compliance Requirements

Financial services firms must comply with strict vendor management regulations:

Federal Requirements

  • GLBA Safeguards Rule vendor oversight
  • FFIEC guidance on third-party relationships
  • OCC Bulletin 2013-29 requirements

State & Industry Standards

  • NYDFS Cybersecurity Regulation Part 500
  • State data breach notification laws
  • PCI DSS for payment processors

Take Control of Your Vendor Risk

Our vendor risk management solutions help you identify, assess, and mitigate third-party security risks while maintaining regulatory compliance. Protect your organization from supply chain vulnerabilities.

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