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Danish University DTU Data Breach Affects Up to 200,000 Users

Danish University DTU Data Breach Affects Up to 200,000 Users

First seen 4 Oct 2026, 04:08 UTC • •
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ThreatCluster AI
ThreatCluster •October 4, 2026 at 06:06 UTC
  • •Up to 200,000 users' data may have been compromised in the DTU breach.
  • •The breach involved unauthorized access to DTU's identity and access management system, DTUBasen.
  • •DTU is notifying affected individuals and advising caution against identity fraud.

The Technical University of Denmark (DTU) reported a data breach affecting up to 200,000 current and former users after hackers accessed its identity and access management system, DTUBasen. The attackers used compromised credentials to log into the system, downloading extensive user data dating back to 2003. DTU cannot confirm the exact details of the downloaded information but warns that it may include sensitive data such as civil registration numbers, names, addresses, and employment-related details. The university is working with external specialists to investigate the breach and has reported the incident to the Danish Data Protection Agency. Notifications will be sent to affected individuals, but not all current and former students will be directly notified. DTU urges caution against potential identity fraud and phishing attempts using the exposed data.

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Timeline

2026-10-03
DTU confirms data breach
DTU disclosed a serious personal data breach involving unauthorized access to its IAM system, affecting up to 200,000 users.
BleepingComputer
2026-10-03
DTU reports incident to authorities
The incident has been reported to the Danish Data Protection Agency for further investigation.
DTU

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Common questions

Who is affected by the breach?
Current and former users of DTU, including students and employees, may be affected.
What type of data was exposed?
The exposed data may include civil registration numbers, names, addresses, and employment-related information.
How is DTU responding to the breach?
DTU is investigating the breach, notifying affected individuals, and has reported the incident to the Danish Data Protection Agency.