Third-Party Vendor Risks: Vetting vendors and their security practices
- JUNE 23RD, 2025
- 2min read
As organisations increasingly rely on third-party vendors for software, services, and infrastructure, the security posture of your vendors becomes an extension of your own. A weak link in a third-party’s environment can expose your organisation to data breaches, compliance violations, or operational disruptions. A good example is Solarwinds supply chain attack where they penetrated the system of a third-party supplier with access to their targets’ network assets.
Key Risks Introduced by Third-Party Vendors
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Insufficient Security Controls: Lack of encryption, patch management, or identity/access policies.
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Data Exposure: Mishandling or unauthorised access to sensitive or regulated data.
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Supply Chain Attacks: Malicious code or backdoors introduced through vendor software updates.
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Access Mismanagement: Over-permissioned vendor accounts with weak authentication.
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Regulatory Non-Compliance: Vendors failing to meet standards like GDPR, HIPAA, or ISO 27001.
Best Practices for Managing Third Party Vendor Risks
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Service Level Agreements (SLAs): Vendor contracts must detail performance, timeliness, and quality standards (SLAs) for their services, including potential penalties for non-compliance.
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Right to Audit: This should allow you to inspect the vendor’s processing facilities as well.
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Information Security Practices: Verify the vendor’s documented information security policies, including access management and data handling practices like encryption, storage, transfer, and data destruction.
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Compliance: Vendors must hold necessary licenses and adhere to regulatory and internal requirements for their activities.
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Incident Response Planning: Ensure vendors have defined incident response procedures and Include vendors in your own response and notification workflows.
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