Dutch Finance Ministry Responds to Cyberattack by Taking Systems Offline

The Dutch Ministry of Finance detected unauthorized access to internal ICT systems in March 2026 and took key systems offline to prevent lateral movement and exfiltration; the treasury banking portal outage has impacted approximately 1,600 public institutions while essential public-facing tax and customs services remain isolated and unaffected. The NCSC, Dutch National Police High Tech Crime Team, and external forensic teams are investigating; no actor or IOCs have been identified and the incident has been reported to the Dutch Data Protection Authority due to possible employee data compromise.