Denmark CPR Breach Traced to Vendor Account Using 123456 Password
The Denmark CPR breach has exposed personal information belonging to 8.8 million individuals after threat actors compromised an IT vendor’s system account secured by the password “123456.” Danish newspaper Politiken reported that the person claiming responsibility accessed the Central Register of Persons through Pays ApS, a Funen-based company with authorized access to validate business customer records. Furthermore, at least three company accounts, including one with administrative privileges, shared the identical weak credential.
Government officials confirmed the intrusion on October 5, though they initially declined to name the compromised vendor. Managing director Sophie Laursen acknowledged Pays ApS as the affected entity on October 9. Meanwhile, the company’s website has been taken offline, and requests for comment regarding the password allegations have gone unanswered.
Attacker Conducted 14 Million Automated Searches Over Ten Days
According to documents obtained by broadcaster TV 2, the unauthorized access began on September 10 and continued until September 20. During this period, the intruder executed approximately 14 million automated queries against the CPR database. Consequently, the register’s roughly 11 million records — including entries for deceased persons and former residents — were potentially viewable. However, the individual behind the activity told Politiken they had no plans to sell or publish the harvested data.
Detection occurred on October 2, twelve days after the final search activity. A ministry staffer noticed an invoice reflecting unusually high system usage from Pays ApS, prompting an internal review. Subsequently, the Danish data protection authority Datatilsynet received notification on October 4, followed by public disclosure the next day.
Security Failures Highlight Systemic Credential Hygiene Gaps
This incident underscores persistent failures in basic credential management across critical infrastructure supply chains. The use of “123456” — consistently ranked among the most common passwords globally — on an administrator account with access to a national identity register represents a severe governance lapse. Additionally, the reuse of this credential across multiple accounts amplified the blast radius considerably.
Security experts emphasize that multi-factor authentication and privileged access monitoring could have prevented or limited the compromise. The Danish government has not yet responded to questions about the alleged password failures or whether broader audits of CPR-access vendors are planned. For organizations managing sensitive data access, the UK National Cyber Security Centre provides updated guidance on credential policies.
Ultimately, the Denmark CPR breach serves as a stark reminder that sophisticated defenses cannot compensate for fundamental hygiene failures. As investigations continue, affected individuals should monitor for potential identity misuse and consider credit monitoring services where available.
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