University of Copenhagen breach exposes data of about 525,000 people
October 27: DataBreaches.net added the university’s size, about 36,800 students and 10,700 employees, and dated the PIN update to the day after Friday’s notice.
The University of Copenhagen says a test-environment breach exposed data on about 525,000 people, including ID-card PINs for about 20,000.
The University of Copenhagen says attackers reached a test environment with names, Danish identity numbers, phones and emails for about 525,000 people. Infosecurity Magazine and GBHackers date an October 25 update on ID-card PINs for about 20,000 people inside that total; BleepingComputer and DataBreaches.net call them another 20,000, with DataBreaches.net placing the update the day after Friday’s notice. Detection was October 20, public disclosure October 23, and the case went to the Danish Data Protection Agency. Officials say attackers were blocked and day-to-day systems were not reached. GBHackers and Infosecurity Magazine reported an October 26 Workzone and Nimbus shutdown; Help Net Security says the university later called it the same breach, and no actor has claimed responsibility.
- Exposed fields include names, Danish identity numbers, phones and personal emails.
- PIN codes for about 20,000 staff and student ID cards were replaced.
- Some campus locations were restricted until the new PIN codes were issued.
- The university has not said whether the full dataset was taken.
- DataBreaches.net cites about 36,800 students and 10,700 employees.
Timeline
dated events in the reporting · oldest first- Oct 20, 2026Intrusion detected in a test environment. · GBHackers
- Oct 23, 2026University disclosed the breach and restricted some campus access. · Cyber Security News
- Oct 25, 2026Update said about 20,000 ID-card PINs were exposed. · Infosecurity Magazine
- Oct 26, 2026Workzone and Nimbus were shut down. · GBHackers
What each outlet adds
beyond the shared facts- Cyber Security NewsSays the 20,000 cardholders sit inside the 525,000 total.
- GBHackersFramed October 26 as another incident shutting Workzone and Nimbus.
- Help Net SecurityUniversity later said Monday’s outage was the original breach.
- Infosecurity MagazineNo threat actor had claimed responsibility.
- DataBreaches.netGives about 36,800 students and 10,700 employees.
- Victims
- University of Copenhagen
- Organizations
- Danish Data Protection Agency
- Countries
- Denmark
Coverage
oldest first · one row per article · UTC- · 3d ago
BleepingComputerFirst report
University of Copenhagen breach exposes data of 525,000 people
Hackers reached a test environment holding names, CPR numbers, phones and emails, plus PIN codes for 20,000 more people.
- · 3d ago
GBHackers
University of Copenhagen confirms breach affecting about 525,000 people
A test database held national identity numbers and contacts, and ID-card PINs for about 20,000 people were later found exposed.
- · 3d ago
Cyber Security News
University of Copenhagen breach exposes data on about 525,000 people
A test-environment intrusion exposed national ID numbers, phones and emails, plus ID-card PINs for about 20,000 people.
- · 3d ago
Infosecurity Magazine
Copenhagen University breach exposes data on about 525,000 people
National identity numbers and physical-access PIN codes were taken from a test environment detected on October 20.
- · 3d ago
Help Net Security
University of Copenhagen breach exposed data of 525,000 people
Attackers entered a test environment; about 20,000 ID-card PIN codes were reset, and Monday's outage was the same incident.
- · 3d ago
DataBreaches.net
University of Copenhagen breach exposes data of 525,000 people
Hackers reached a test environment, and a later update said PIN codes of another 20,000 staff and students were exposed.