Today’s threat landscape is changing too quickly, vendor ecosystems are too interconnected, and attacker tactics are too sophisticated for static assessments to provide meaningful long-term assurance.

Recent industry research found that 30% of breaches now involve a supplier or vendor, double the previous year’s figure. This sharp increase highlights how vendor and supply-chain exposure is rapidly becoming one of the most significant cybersecurity risks organizations face today.

SecurityScorecard’s 2025 Global Third-Party Breach Report found that 35.5% of breaches now originate through third parties.

Most organizations no longer operate within clearly defined network boundaries. Instead, they function within large, interconnected digital ecosystems made up of vendors, partners, integrations, cloud platforms, and external service providers.

Many third parties have direct or indirect access to sensitive data, business systems, customer environments, and operational infrastructure. Attackers increasingly exploit trusted vendor relationships, compromised credentials, vulnerable software, and

insecure integrations to gain indirect access into customer environments.

Traditional third-party risk management is often treated as a point-in-time exercise. A vendor may pass onboarding assessments with minimal risk exposure, but months later, their access may have expanded, infrastructure may have changed, new integrations may exist, and vulnerabilities may have emerged.

SecurityScorecard’s 2025 Supply Chain Cybersecurity Trends Report emphasizes that modern supply-chain resilience requires continuous monitoring and ongoing reassessment rather than periodic compliance checks.

One of the most difficult aspects of modern third-party security is fourth-party exposure – the vendors behind your vendors.

Organizations may carefully assess a direct supplier without realizing that the supplier itself relies on downstream providers, outsourced developers, cloud services, or software dependencies.

This creates layers of inherited risk that are often difficult to identify and even harder to manage.

Supply Chain Attacks are increasingly driven by compromised credentials, exposed APIs, vulnerable software, weak identity controls, and excessive vendor permissions.

As organizations continue adopting cloud-first and SaaS-driven operating models, identity and access governance become central to third-party risk management.

Organizations often struggle to fully understand: 

• Which vendors have access to critical systems or sensitive data 
• What security controls vendors maintain 
• Whether subcontractors or fourth parties are involved 
• How quickly suppliers can detect and respond to incidents

Without ongoing oversight, these unknowns create silent exposure that accumulates over time.

Third-party risk management is becoming a governance and regulatory issue – not just a technical one.

Boards, insurers, regulators, and customers are placing increasing scrutiny on vendor security practices and supply-chain resilience.

A mature approach includes: 

• Vendor risk classification based on access and criticality 
• Security due diligence before onboarding 
• Contractual security and breach notification requirements 
• Continuous monitoring and reassessment 
• Identity and access governance 
• Incident response coordination with vendors

Organizations can no longer secure only their own environment and assume they are protected.

Third-party risk management is no longer a once-a-year procurement exercise. It is an ongoing operational resilience function.

Iron Spear helps organizations assess third-party risk, strengthen vendor governance, and implement practical risk management approaches that improve resilience across complex digital ecosystems.

www.ironspear.ca

Verizon. 2025 Data Breach Investigations Report (DBIR).
https://www.verizon.com/business/resources/reports/dbir/ 

SecurityScorecard. 2025 Global Third-Party Breach Report.
https://securityscorecard.com/wp-content/uploads/2025/03/SSC-Third-Party-Breach-Report_031225_03.pdf 

SecurityScorecard. 2025 Supply Chain Cybersecurity Trends Report.
https://securityscorecard.com/wp-content/uploads/2025/06/2025-Supply-Chain-Cybersecurity-Trends.pdf 

Government of Canada. Cyber supply chain: An approach to assessing risk (ITSAP.10.070).
https://www.cyber.gc.ca/en/guidance/cyber-supply-chain-approach-assessing-risk-itsap10070 

NIST. Cybersecurity Supply Chain Risk Management Practices for Systems and Organizations (SP 800-161).
https://csrc.nist.gov/pubs/sp/800/161/r1/upd1/final