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Many small and medium-sized enterprises (SMEs) still rely on older systems like Windows XP, whether for legacy software compatibility or industrial applications that can’t be upgraded just yet.
While using outdated systems may seem like an obstacle to achieving Cyber Essentials certification, it’s not an insurmountable one.
In this blog, we’ll explore the specific challenges Windows XP poses for Cyber Essentials compliance and how you can still meet the five key technical controls needed to obtain certification, even with an old and unsupported operating system.
Windows XP, officially retired by Microsoft in 2014, no longer receives security patches, updates, or support. This leaves systems running XP vulnerable to security threats and increases the complexity of compliance with Cyber Essentials’ five technical controls.
Here’s why:
No Security Patches: Microsoft no longer releases security updates for Windows XP, meaning vulnerabilities are left unpatched.
Outdated Protocols & Libraries: XP uses old protocols that are often incompatible with newer, more secure technologies.
Lack of Built-in Security Features: Windows XP lacks support for modern security measures like multi-factor authentication (MFA), encrypted storage, and advanced firewall configurations.
Limited Visibility & Logging: The OS offers limited monitoring capabilities, which are crucial for tracking suspicious activity and maintaining a strong security posture.
Despite these limitations, obtaining Cyber Essentials certification is still possible if you take the right approach.
To obtain Cyber Essentials certification, your systems must comply with the following five technical controls:
Firewall Configuration
Secure Configuration
Patching
Access Control
Malware Protection
Let’s go over how to meet these requirements while using Windows XP.
Businesses using legacy systems face significant challenges in ensuring their networks remain secure, especially with the increased use of personal devices by employees.
That’s why Syn-Star has created this comprehensive guide to help you keep your business secure.
Start by identifying all your Windows XP machines and assessing the level of risk they pose. You’ll need to document all hardware, software, and network configurations and compare versions to see if they’re still supported by vendors.
Any XP systems that cannot be patched or upgraded should be flagged as “legacy.” In your Cyber Essentials self-assessment, you can define a “segregated zone” for these systems. This means they will be considered out of scope for some controls, as long as they are sufficiently isolated from the rest of your network.
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The best way to reduce risk from legacy systems is by isolating them. Place Windows XP machines in a dedicated VLAN or network segment. Limit the traffic between this segment and your core network, and only allow access through well-defined firewall rules or DMZ (demilitarised zone).
This isolation helps contain any potential breaches, preventing lateral movement within your network.
Even though Windows XP is no longer officially supported, you should still apply any patches or updates that are available. Some XP systems can still receive important security updates through extended support programs or third-party vendors.
Where patches aren’t available, look into community patches, hotfixes, or mitigations like wrapper protection or virtual machine isolation. Ensure that any third-party software running on XP systems is fully updated and secured.
Want to discuss how to securely use legacy operating systems without compromising your business security.
For XP systems that can’t be patched or updated, you’ll need to implement compensating controls to reduce risk. These might include:
Strict Firewall Rules: Limit inbound and outbound traffic to only the necessary ports and services.
Host-Based Intrusion Prevention Systems (HIPS): If supported, deploy HIPS on the XP machines to monitor for suspicious activity.
Application Whitelisting: Only allow pre-approved applications to run, blocking any unauthorised software.
Disabling Unused Services: Disable any non-essential services or ports that could serve as attack vectors.
Least Privilege Account Control: Enforce strong access controls and ensure that users have only the minimal privileges necessary to do their job.
These extra layers of security help mitigate the vulnerabilities that Windows XP cannot address.
Ensure that all traffic entering or leaving your Windows XP network segment passes through a properly configured firewall. Use a deny by default policy, meaning any unsolicited traffic should be blocked. Implement stateful inspection and filtering for inbound and outbound traffic to ensure no unauthorised communication occurs.
It’s also important that the firewall itself is properly hardened, with no default passwords and up-to-date configurations.
Windows XP does not support modern identity management features like MFA. However, you can still enforce strong, unique credentials for any users accessing XP systems. Consider using a jump host or bastion server as a secure access point for authorised personnel to access legacy systems.
Additionally, network segmentation means limiting access to critical systems, ensuring that legacy machines are not exposed to unnecessary risk.
While Windows XP does not support modern antivirus solutions, there are still ways to mitigate malware risks. You can either:
Use network-level scanning to detect malware entering or leaving your legacy systems.
Implement gateway antivirus solutions that inspect traffic before it reaches your XP machines.
Alternatively, deploy antivirus or endpoint protection software that supports older operating systems, ensuring it provides at least basic detection and mitigation capabilities.
Windows XP offers limited logging and monitoring capabilities. However, you should still enable whatever logging is possible and funnel these logs to a central security monitoring system. This will help you detect any suspicious activity, even on legacy machines.
Where direct logging isn’t possible, deploy network-based monitoring solutions (such as IDS/IPS or anomaly detection systems) to detect irregular traffic or behaviour patterns that could indicate a breach.
When preparing your Cyber Essentials self-assessment, be sure to thoroughly document your efforts.
Include:
While using Windows XP is a viable short-term strategy, it’s important to plan for its eventual replacement. The cost of maintaining legacy systems, especially when weighed against the risk of a security breach, may eventually outweigh the cost of upgrading.
As part of your Cyber Essentials certification, be sure to document a plan for the gradual replacement or upgrade of legacy systems, ensuring future alignment with modern security standards.
It’s true that Windows XP is no longer officially supported, but this doesn’t mean that your business can’t achieve Cyber Essentials certification. By carefully following the strategies outlined above, inventorying your legacy systems, segmenting your network, applying compensating controls, and documenting everything you can significantly reduce the security risks associated with using outdated systems.
If you’re unsure of where to start or need help implementing these controls, don’t hesitate to reach out to a cyber security professional. At Syn-Star, we specialise in helping businesses, including those using legacy systems like Windows XP, achieve Cyber Essentials certification without compromising security.
Yes, but only if the systems are properly isolated and secured. Windows XP should not be exposed to the wider network or the internet, and compensating controls must be in place to mitigate any associated risks.
Not immediately. However, it is highly recommended to plan for an upgrade in the long term, as maintaining XP systems indefinitely may pose a security risk.
Some antivirus solutions support legacy systems like XP. You’ll need to verify compatibility and ensure the system is adequately protected against modern threats.
Contact Syn-Star for expert guidance on securing your outdated technology while staying compliant.
Giles Cleverley founded Syn-Star in 2002 shortly after graduating from Portsmouth university with an honours degree in Business & Economics.
His extensive knowledge and experience in IT strategy and business technology solutions. He is passionate about driving innovation and delivering tailored IT support that helps UK small and medium size businesses thrive. Under his leadership, Syn-Star continues to provide cutting-edge managed IT services designed to meet the evolving needs of modern organisations.
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