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DTU Data Breach Exposes Personal Data of 200,000 Users

DTU Data Breach Exposes Personal Data of 200,000 Users

First seen 4 Oct 2026, 08:03 UTC • •
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ThreatCluster AI
ThreatCluster •October 4, 2026 at 09:03 UTC
  • •Up to 200,000 users affected by the breach at DTU.
  • •Attackers compromised legitimate user credentials to access sensitive data.
  • •DTU's IT team has contained the attack and is investigating with external specialists.

The Technical University of Denmark (DTU) reported a data breach on October 4, 2026, affecting up to 200,000 current and former users. Attackers accessed DTUBasen, the university's identity and access management system, by compromising legitimate user credentials. The breach potentially exposes sensitive information, including Danish civil registration numbers, names, addresses, and contact details, dating back to 2003. DTU's IT incident response team has contained the attack and is collaborating with external specialists to assess the impact. The incident has been reported to the Danish Data Protection Agency. However, DTU cannot confirm the exact data accessed or the number of individuals affected. No malware or technical indicators have been identified at this time. The breach raises concerns about increased risks of identity theft and targeted phishing attacks.

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Timeline

2026-10-04
Data breach reported
DTU disclosed a significant data breach affecting personal data of up to 200,000 users due to unauthorized access to DTUBasen.
www.dtu.dk
2026-10-04
Incident containment
DTU's IT incident response team contained the breach and is working with external specialists to investigate its extent.
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Common questions

What data has been exposed?
The breach may expose sensitive personal information, including Danish CPR numbers, names, addresses, and contact details.
How many users are affected?
Up to 200,000 current and former users of DTU may be affected by the breach.
What should I do if I'm affected?
Affected individuals should monitor for identity theft and be cautious of phishing attempts.