Common Cyber Essentials Failures and How to Avoid Them
Security Boulevard, Friday, June 5th, 2026
Guide to the most common UK Cyber Essentials failures, patching, unsupported software, MFA, admin accounts, and how to avoid them.
This article catalogs the most frequent reasons organizations fail the UK's Cyber Essentials certification and how to avoid them.
The top failure is security patching: critical/high-risk patches (CVSS 7+) must be applied within 14 days across operating systems, applications, firmware and cloud services, so enabling automatic updates is advised.
Unsupported software is another leading cause, since it no longer receives security updates. Other common failures include missing MFA on cloud services, using administrator accounts for day-to-day work instead of standard accounts, and firewall misconfigurations such as default credentials, open ports and overly permissive rules.
The guidance: define scope clearly, honestly check the five controls, and run a gap review and dry run before submission to turn assessment day into a formality rather than a gamble.