Major websites, including DigiD, MijnOverheid, hospital websites and RTL, were taken offline after warnings about vulnerabilities in the widely used programming language PHP. The disruption affected thousands of sites, according to one report.

In Twente, the websites of FC Twente, Elektramat and several municipalities were also affected. DigiD and MijnOverheid were taken offline as a precaution, and one report said they had not been hit.