Most organisations today use applications, cloud services, and third-party software components. These form the software supply chain – the entire ecosystem of suppliers, technologies, and dependencies that support digital systems.
The National Cyber Security Directorate (DNSC) published a guide for SMEs explaining the risks associated with this chain and the measures companies can take to protect their digital infrastructure.
In an environment where business processes are increasingly digital, security no longer depends solely on a company's internal systems, but also on the security of its suppliers and the software components used.
Why software supply chain security matters
Modern software is built from numerous external components:
- open-source libraries
- cloud services
- SaaS platforms
- vendor-developed modules
- updates and patches distributed online
If one of these components is compromised, the vulnerability can propagate to all organisations using that software.
These types of incidents are known as supply chain attacks, and their impact can be major as they simultaneously affect multiple organisations.
Common risks identified by DNSC
The DNSC guide highlights several common scenarios through which vulnerabilities can arise:
Vulnerabilities in external software components
Libraries or modules integrated into applications may contain exploitable security flaws.
Compromised updates
In some cases, attackers can introduce malicious code into a software update distributed to users.
Weak security practices at suppliers
A supplier that does not implement adequate security controls can become an entry point for attackers.
Lack of visibility over components used
Many organisations do not have a clear inventory of the software dependencies used in their systems.
Essential recommendations for SMEs
DNSC proposes several practical measures that can significantly reduce risks.
Evaluate supplier security
Before adopting a software solution, verify:
- the supplier's reputation
- security policies
- vulnerability management practices
- security incident history
Monitor software components used
It is important to have a clear inventory of the applications and components used in the organisation. This enables rapid identification of vulnerabilities when new security alerts arise.
Implement regular updates
Security patches and updates must be applied promptly to reduce risk exposure.
Include security requirements in supplier relationships
IT supplier contracts should include provisions for:
- data security
- incident notification
- vulnerability management
Prepare incident response plans
Organisations must have clear procedures for managing security incidents and collaborating with critical suppliers.
Key takeaways for managers
- Digital security depends not only on internal infrastructure, but also on the software suppliers used
- Modern applications are built from numerous external components
- Vulnerabilities can appear in any link of the software chain
- Supplier evaluation and component monitoring are essential for risk reduction
How secure digital platforms contribute
In digital processes involving documents and contracts, the security of the platform used is essential. A secure platform must provide:
- user access control
- full action traceability (audit trail)
- document integrity protection
- secure cryptographic infrastructure
These mechanisms reduce the risk of document tampering and increase trust in digital processes.
Complete DNSC resource
For complete details and technical recommendations, the guide can be accessed here:
Access the DNSC guides