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Weak Password Breach Exposes Danish National Registry Data

Weak Password Breach Exposes Danish National Registry Data

First seen 17 Oct 2026, 16:47 UTC • •
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ThreatCluster AI
ThreatCluster •October 17, 2026 at 18:20 UTC
  • •A hacker accessed Denmark's national ID register using the password '123456'.
  • •Approximately 8.8 million citizens' sensitive data was exposed.
  • •The breach went undetected for 10 days, highlighting severe security flaws.

A hacker reportedly accessed Denmark's national ID register using the simple password '123456', exposing sensitive information of approximately 8.8 million citizens. The breach began on September 10 and went undetected for 10 days until its discovery on October 2, 2026. The incident highlights severe security flaws in the Danish government's data protection practices, as the use of such a weak password allowed unauthorized access to critical government data. This breach serves as a stark reminder of the importance of strong password policies and practices in safeguarding sensitive information. The Danish government has not yet released specific details on remedial actions taken following the breach. The incident raises questions about the security protocols in place for managing sensitive databases.

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Timeline

2026-09-10
Breach begins
The hacker accessed the Danish national ID register using the password '123456'.
Techpowerup
2026-10-02
Breach discovered
The unauthorized access to the national ID register was discovered after 10 days of exploitation.
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Common questions

How many citizens are affected?
Approximately 8.8 million citizens' sensitive data was exposed in the breach.
What was the attack method?
The attacker gained access using the weak password '123456', exploiting poor password management.
What actions are being taken in response?
The Danish government has not yet detailed specific remedial actions following the breach.