CPR is the national register of all people (Central Person Register).

CPR is the administrator. There is more information in the linked press release from the ministry:

https://ufm.dk/aktuelt/pressemeddelelser/2026/oktober/omfatt...

This is a huge headline story in Denmark today and I choose to link danish content as they are the primary source.

The only current english language sources are paywalled:

https://www.thelocal.dk/20261005/hackers-get-personal-info-o...

https://www.bloomberg.com/news/articles/2026-10-05/denmark-d...

Non-paywalled but major danish news outlet (National Brodcaster):

https://www.dr.dk/nyheder/indland/live-uvedkommende-har-haft...