15.5
IG3

Assess Service Providers

Asset Type: N/A
Security Function: Identify

Description

Assess service providers consistent with the enterprise’s service provider management policy. Assessment scope may vary based on classification(s), and may include review of standardized assessment reports, such as Service Organization Control 2 (SOC 2) and Payment Card Industry (PCI) Attestation of Compliance (AoC), customized questionnaires, or other appropriately rigorous processes. Reassess service providers annually, at a minimum, or with new and renewed contracts.

Implementation Checklist

1
Document current state and create baseline inventory
2
Define data fields and attributes to track
3
Assign ownership and responsibilities
4
Establish review cadence and update procedures
5
Draft policy/procedure document
6
Obtain stakeholder review and approval
7
Communicate to affected personnel
8
Schedule periodic review and updates
9
Inventory all third-party service providers
10
Classify third parties by risk level
11
Conduct security assessments of critical vendors
12
Include security requirements in contracts

Threats & Vulnerabilities (CIS RAM)

Threat Scenarios

Engagement with Provider Having Inadequate Security Controls

Confidentiality

The organization entrusts sensitive data to a service provider with a weak security posture because no assessment was conducted, and the provider subsequently suffers a breach affecting enterprise data.

Provider Security Posture Degrades Over Contract Period

Integrity

A service provider that was initially compliant reduces security investments over the contract period, and the degradation goes unnoticed because no periodic reassessment is performed.

Vulnerabilities (When Safeguard Absent)

No Security Assessment of Service Providers

Without assessing service providers through SOC 2 reviews, questionnaires, or equivalent processes, the organization has no objective understanding of each provider's actual security capabilities and practices.

No Periodic Reassessment of Provider Security Posture

Absence of annual or contract-renewal reassessment means the organization relies on initial assessments that may no longer reflect the provider's current security state.

Evidence Requirements

Type Evidence Item Collection Frequency
Document Current inventory or catalog documentation Maintained continuously, reviewed quarterly
Document Process/procedure documentation for identification activities Reviewed annually
Record Third-party risk assessment reports and scorecards Annually per vendor
Document Vendor contracts with security requirements Per contract cycle
Document Governing policy document (current, approved, communicated) Reviewed annually