Vendor risk and privacy compliance: Why third-party data sharing is the next CPRA enforcement focus

For professional services firms in San Mateo County, client data moves through more systems than ever before.

Accounting firms rely on tax software, payroll platforms, cloud document storage, and client portals. Financial advisors use CRM systems, portfolio tools, planning software, and marketing platforms. Law firms manage case files, billing systems, e-discovery tools, and secure communication platforms.

Each vendor may improve efficiency. Each one may also create privacy risks.

Under California’s evolving privacy landscape, businesses are expected to understand not only what personal information they collect, but also where it goes, who can access it, and how third parties protect it. For firms throughout San Mateo, Belmont, Foster City, and the surrounding Peninsula, vendor risk management is becoming a critical part of CPRA compliance. A privacy policy alone is no longer enough.

Why third-party data sharing matters under CPRA

The California Privacy Rights Act expanded expectations around how businesses collect, use, share, and protect personal information. For professional services firms, that matters because client data rarely stays in one place.

It may pass through:

• Cloud storage providers
• Accounting platforms
• Practice management systems
• CRM tools
• Payment processors
• Marketing automation platforms
• AI tools
• IT service providers

If a vendor mishandles personal information, your firm may still face client trust issues, regulatory scrutiny, and cybersecurity exposure. That makes vendor oversight essential.

The vendor risk gap many San Mateo firms overlook

Many firms review vendors based on features, pricing, and ease of use. Far fewer ask deeper questions about privacy and security. For example:

• What personal information does the vendor collect?
• Is sensitive personal information involved?
• Where is the data stored?
• Does the vendor use subcontractors?
• Can the vendor use data for its own purposes?
• What happens if the vendor experiences a breach?
• Are privacy obligations clearly documented in the contract?

Without answers, firms may not fully understand their exposure.

The CPRA vendor questions every professional firm should ask

Before sharing client or employee information with a third party, firms should evaluate both privacy and cybersecurity controls.

Data collection and use

Start with the basics. What data does the vendor need, and why? Vendors should only receive the information necessary to provide the service. Excessive data sharing increases both privacy and cybersecurity risk.

Contractual protections

Vendor agreements should clearly define:

• How personal information may be used
• Whether data can be sold or shared
• Security requirements
• Breach notification responsibilities
• Data return or deletion procedures

If vendor contracts have not been reviewed since CCPA was first introduced, they may not reflect current CPRA expectations.

Security controls

Privacy compliance depends on security. Firms should evaluate whether vendors maintain appropriate safeguards, including:

• Encryption
• Multi-factor authentication
• Access controls
• Security monitoring
• Incident response procedures
• Regular risk assessments

A vendor with weak cybersecurity can quickly become your firm’s privacy problem.

Subprocessor visibility

Many technology vendors rely on additional third parties. Those relationships matter. Your firm should understand whether vendors use subprocessors and whether those subprocessors also meet privacy and security requirements.

Why professional services firms face higher trust expectations

Clients expect accountants, attorneys, and financial advisors to be careful stewards of sensitive information. In San Mateo County and across the Bay Area, those expectations are especially high. Many clients are technology-savvy, privacy-aware, and accustomed to asking detailed questions about data protection.

A privacy failure can affect:

• Client relationships
• Referral trust
• Professional reputation
• Regulatory exposure
• Cyber insurance readiness

Vendor risk management is not just a compliance activity. It is part of protecting client confidence.

A Practical vendor risk assessment checklist

Professional firms can start improving CPRA readiness by asking:

• Do we have a current inventory of vendors that access personal information?
• Do we know what data each vendor receives?
• Have vendor contracts been reviewed for privacy and security obligations?
• Are vendors required to notify us after a security incident?
• Do vendors support deletion or return of data?
• Are high-risk vendors reviewed annually?
• Do we have internal ownership for vendor oversight?

If the answer to several of these questions is “no” or “not sure,” your firm may have hidden privacy and cybersecurity gaps.

How CMIT San Mateo helps firms strengthen vendor risk and privacy readiness

At CMIT Solutions San Mateo, we help accounting, financial, legal, and professional services firms better understand and manage cybersecurity risk. Our services include:

Cybersecurity assessments

Identify vulnerabilities and gain visibility into areas that may affect privacy readiness.

Vendor risk reviews

Evaluate third-party relationships and identify potential security or data protection concerns.

Data mapping support

Understand where sensitive information lives, where it moves, and which vendors can access it.

Security controls and monitoring

Strengthen protections around systems, users, devices, and sensitive client information.

Ongoing IT and compliance guidance

Support privacy-conscious business operations with practical, business-focused technology guidance.

Privacy compliance starts with visibility

You cannot protect data you cannot see. And you cannot manage vendor risk if you do not know which vendors have access to sensitive information.

For San Mateo County professional services firms, CPRA readiness increasingly depends on understanding the full data ecosystem—not just internal systems, but every third party that touches client or employee information. The firms that stay ahead will be the ones that treat vendor oversight as part of cybersecurity, compliance, and client trust.

Contact Us