.png)
Organisations increasingly depend on external vendors, cloud service providers, software solutions, and other third-party providers to support their daily operations. While these relationships improve the efficiency of an organisation, they also introduce cybersecurity risks that can extend beyond an organisation’s direct control.
Understanding the Difference
Third-party risk refers to security, operational, or compliance risks that can be introduced by external organisations that have access to a company’s systems or data. Some examples include cloud hosting providers, payment processors, managed service providers, et cetera.
Supply-chain risk involves vulnerabilities that can exist within the products, software, and services that an organisation depends on. These risks can originate from software components, hardware manufacturers, or service providers that may not be directly visible to the organisation.
Why These Risks Matter
Cybercriminals increasingly target vendors and suppliers because compromising a trusted vendor can provide them with access to multiple organisations simultaneously. Instead of attacking a well-protected organisation directly, they often target the weaker links within the supply chain, which are these third-party vendors.
An important example is the SolarWinds cyberattack. In this case, the attackers targeted the SolarWinds software development environment and inserted malicious code into software updates. These updates were distributed to thousands of customers, including government agencies and large corporations. The affected customers unknowingly installed the compromised updates, allowing the attackers to gain unauthorised access to their environments. This incident demonstrates how a single vendor compromise can impact the security of multiple organisations.
The impact can include:
• Data breaches
• Unauthorised access
• Financial losses and fraud
• Business disruption and downtime
• Regulatory penalties
• Reputational damage
• Loss of customer trust
As organisations become more interconnected, their attack surface extends far beyond their own networks and systems.
Managing Third-Party and Supply-Chain Risk
In practice, third-party risk management is often underdeveloped, not because organisations do not care, but because it is easy to deprioritise risks that are not immediately visible as potential threats.
Managing these risks requires continuous monitoring throughout the vendor lifecycle rather than a one-time assessment during onboarding.
If not already in practice, organisations should begin by conducting due diligence before engaging suppliers. This includes evaluating their security controls, compliance certifications, incident response capabilities, and any history of security incidents. Security expectations should be clearly defined within contracts, covering topics such as data protection, access management, vulnerability management, and breach notification requirements.
Any access granted to third parties should follow the principle of least privilege, ensuring that vendors only have the permissions necessary to perform their responsibilities and nothing more. Regular access reviews should also be conducted to validate that access remains appropriate.
Organisations should maintain an inventory of all vendors and suppliers, identifying which third parties have access to critical systems or sensitive data. Continuous monitoring, threat intelligence, vulnerability tracking, and reviews of software dependencies can help identify emerging risks before they lead to incidents.
One of the most important aspects is incorporating third-party dependency scenarios into incident response and business continuity plans. This ensures that organisations are prepared to respond quickly if a vendor or supplier experiences a security breach.
Conclusion
While organisations may have strong internal security controls, their overall security posture is also influenced by the vendors and suppliers they depend on. As organisations continue to rely on third-party services, the risks associated with them become an unavoidable aspect of doing business.
Therefore, effective cybersecurity requires organisations to look beyond their own boundaries. It requires the implementation of robust vendor risk management processes and the continuous monitoring of external dependencies.
In today’s interconnected world, security is not just about securing your own environment. It is also about understanding and managing the risks introduced by every organisation that helps keep your business running.
If you would like to get in touch with us to discuss how we can support your cybersecurity needs - please reach out to us: hello@onecybervalley.com
By 1 Cyber Valley | June 22nd, 2026 | Harshita Yadav
