Third-Party Risk - The Biggest Gap in Client Security Posture
Basically, third-party risks are when vendors or tools your clients use can lead to security breaches.
A new guide highlights the significant risks posed by third-party vendors to client security. Organizations must adapt their strategies to manage these risks effectively. Ignoring third-party vulnerabilities can lead to costly breaches and compliance issues.
What Happened
In today's interconnected business landscape, the next major data breach affecting your clients might not come from within their own systems. Instead, it could stem from a vendor they trust, a SaaS tool their finance team signed up for, or a subcontractor that internal IT teams are unaware of. This shift in the attack surface is highlighted in Cynomi's new guide, Securing the Modern Perimeter: The Rise of Third-Party Risk Management.
Why It Matters
The 2025 Verizon Data Breach Investigations Report revealed that third parties are involved in 30% of breaches. Moreover, the average remediation cost for a third-party breach is estimated at $4.91 million, according to IBM's 2025 Cost of a Data Breach Report. This makes third-party risk management (TPRM) not just a compliance issue but a critical security concern that organizations must address.
The Modern Perimeter Has Expanded
Historically, cybersecurity strategies focused on a defined perimeter, utilizing firewalls and identity management systems to protect internal assets. However, this boundary has dissolved. Client data now resides in various third-party SaaS applications and flows through vendor APIs. This means that security measures must extend beyond owned infrastructure to include an interconnected ecosystem of external providers.
From Checkbox to Core Risk Function
Traditional vendor risk management relied on annual questionnaires and spreadsheets, which are no longer sufficient. Regulatory frameworks like CMMC, NIS2, and DORA demand ongoing oversight of third-party controls. Boards are now asking tougher questions about vendor exposure, and cyber insurers are scrutinizing supply chain hygiene before issuing policies. The market is responding, with global TPRM spending projected to grow from $8.3 billion in 2024 to $18.7 billion by 2030.
Scaling TPRM Challenges
While many MSPs and MSSPs recognize the opportunity in TPRM, they often struggle with delivery. The traditional approach involves fragmented workflows and manual analysis, which can be costly and difficult to scale. Many providers currently view TPRM as a one-off project rather than a recurring managed service, limiting their potential.
Turning TPRM into a Revenue Engine
Third-party risk discussions are ongoing and can be initiated with every new vendor a client onboards. Effective TPRM keeps service providers embedded in client strategy, allowing them to offer broader security advisory work and build stronger client relationships. Providers who develop structured TPRM capabilities can differentiate themselves in a crowded market and signal maturity to prospective clients.
The Bottom Line
Third-party risk is a persistent issue that organizations cannot afford to ignore. As vendor ecosystems grow more complex, those who manage this exposure effectively will gain a significant advantage in resilience and compliance. Building a structured TPRM practice not only creates leverage but also positions service providers as integral partners in their clients' security programs. Cynomi's guide serves as a practical starting point for understanding and operationalizing TPRM at scale.