Vendor Security Scorecard for Professional Services Firms
Every software tool and sub-contractor that accesses your systems or data represents a potential supply chain risk. Professional services firms typically use 30–50 SaaS tools and engage multiple sub-contractors per year — each a potential route for attackers to reach your clients through you. This scorecard provides a structured approach to assessing vendor security for professional services firms.
The average professional services firm uses 47 SaaS applications — each a potential supply chain attack vector.
Vendor Security Assessment Categories
The Vendor Security Scorecard assesses vendors across five categories:
- Security certifications — ISO 27001, SOC 2 Type II, Cyber Essentials; higher weighting for UKAS/AICPA accredited certifications
- Data handling — where data is stored, encryption standards, data residency, sub-processor chain
- Access controls — MFA enforcement, least privilege, privileged access management, offboarding procedures
- Incident response — breach notification procedures, historical breach record, incident response capability
- Contractual protections — DPA, right to audit, security SLAs, liability caps, breach notification timescales
Frequently Asked Questions
How often should we reassess vendor security?
Critical vendors (those with access to sensitive client data or core systems) should be assessed annually and whenever there is a significant change to the relationship — new system access, change of ownership, or a publicised security incident. Lower-risk vendors (those with limited data access) can be assessed at contract renewal. Any vendor that suffers a publicised breach should be reassessed immediately, regardless of when their last assessment occurred.
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