A software error on its tax portal government of Denmark exposed them ID numbers of 1,26 million Danish citizens. This figure accounts for one fifth of the country’s total population.
According to local media, the error was discovered at the end of January, but has been around for five years (between 2 February 2015 and 24 January 2020).
The mistake and leak of personal information identified by Service for the Development and Simplification of Denmark (Udviklings-og Forenklingsstyrelsen or UFST), during an audit.
According to UFST, the error was found in TastSelv Borger, the official self-service portal used by Danish citizens to pay their taxes on-line.