# The Hidden Threat: Understanding and Preventing Cyber Security Supply Chain Attacks
*Category: Threat Intelligence · Author: Cyber Data Services Team · Published: 2025-01-16 · https://cyberdataservices.uk/blogs/hidden-threat-supply-chain-attacks*

> The recent breaches at Marks & Spencer and Adidas show that your cyber security is only as robust as the weakest link in your supply chain. Here's how supply chain attacks work, and what to do about them.
In an increasingly interconnected digital world, the strength of your cyber security is only as robust as the weakest link in your supply chain. Recent events have once again brought this reality into sharp focus, most notably, the cyber attacks on UK retail giant Marks & Spencer and global sportswear brand Adidas.

## The M&S and Adidas Breaches: Costly Lessons in Supply Chain Risk

The recent breach at Marks & Spencer reportedly cost the company up to £300 million. This staggering figure underscores the severe financial and operational impact that vulnerabilities in third-party partners can have on enterprise organisations.

Similarly, Adidas experienced a significant data exposure affecting millions of customers, highlighting the critical importance of ensuring third-party vendors adhere to rigorous security standards.

## What Are Supply Chain Attacks?

A supply chain attack is a cyber attack that seeks to damage an organisation by targeting less-secure elements in the supply chain. A cybercriminal compromises a third-party vendor, software, or service that the target organisation relies on.

These can be software-based (like a compromised update or library) or hardware-based (such as tampering with devices before delivery). A prime example of this is the infamous SolarWinds breach, where attackers compromised a software update mechanism to infiltrate thousands of organisations globally.

## Why Do Supply Chain Attacks Happen?

- **Weak Security Controls:** Smaller vendors often lack the enterprise-grade security posture of their larger clients.
- **Lack of Visibility:** Organisations struggle to maintain continuous visibility into the security practices of their extensive vendor networks.
- **Complexity and Scale:** Modern digital supply chains are vast and complex, making comprehensive monitoring difficult.
- **Trust Exploitation:** Systems are often designed to inherently trust internal networks and established vendor connections.

A significant share of network intrusions now reach their target through a third party rather than head-on, which makes the supply chain an attractive route for sophisticated threat actors.

## What Can Be Done?

- **Vendor Risk Assessments:** Conduct thorough and regular evaluations of third-party security postures.
- **Zero Trust Architecture:** Implement strict access controls assuming no network or connection is inherently safe.
- **Continuous Monitoring:** Deploy automated tools to continuously monitor vendor networks for vulnerabilities or breaches.
- **Contractual Security Clauses:** Ensure security requirements are deeply embedded within vendor contracts and SLAs.
- **Incident Response Planning:** Develop and test specific response plans for supply chain compromises.

## Assess Your Risks Now

Don't wait for a third-party breach to expose your organisation's sensitive data. Take proactive steps today to secure your digital supply chain.

Contact Cyber Data Services to discover how our expert team can help you assess your vendor risks, implement robust security frameworks, and protect your critical assets against supply chain threats.

---
Source: https://cyberdataservices.uk · Cyber Data Services (trading name of Tom Sykes Ltd, company no. 06947397), part of the Stiperstone Group.
General information only, not specific security or legal advice. For guidance on your own systems, contact info@cyberdata.services or 01952 972 404.