Incident overview
A security breach in Denmark has exposed the personal information of approximately 8.8 million individuals. The data was accessed via a national civil register known as the CPR, which contains sensitive identification details for citizens and residents.
Local reports suggest the breach did not involve a sophisticated technical exploit. Instead, unauthorised access was gained through three administrative accounts belonging to a small IT company that provided services linked to the register. One of these accounts reportedly used the password '123456'.
The risk of weak credentials
This incident highlights a common vulnerability in business security: the use of simple, easily guessed passwords for accounts with high-level permissions. While the IT company involved was small, their access to a national database meant that a single weak password had a disproportionate effect.
In the UK, many small and medium businesses use third-party providers for software support or data management. If these providers do not maintain strict security standards, your business data could be at risk through no direct fault of your own internal team.
Recommendations for UK businesses
To reduce the risk of similar breaches, business owners should ensure that all accounts—especially those with administrative access to client data—are protected by more than just a password.
Multi-factor authentication (MFA) is a standard security measure that requires a second form of identification, such as a code from a mobile app, before access is granted. This prevents an attacker from entering a system even if they correctly guess a password.
We also advise regular audits of third-party access. You should be aware of which external companies have access to your systems and ensure they follow the same security protocols as your own staff. It is not currently known if the IT firm in Denmark had been required to undergo regular security audits by the government agency involved.