Hack at Belgium’s finance service takes MyMinfin offline; police investigate
Belgium’s tax authority said on 29 October that a cyberattack had been stopped after attackers entered its environment. According to the service, they did not gain access to data; several services had to be isolated for recovery.
The attack took place during the night of Tuesday 27 to Wednesday 28 October. The Federal Public Service Finance said its security tools and monitoring detected the intrusion within hours. Components that might have been compromised were separated from the remaining systems. This took MyMinfin and other digital applications offline.
In its official update of 29 October, the authority said the attackers had not progressed far enough to take over applications or access information. It said no data had leaked. The federal police and the Centre for Cybersecurity were brought in to investigate who was responsible for the hacking.
The affected online services must be restored in an isolated environment. The authority says this requires time to avoid further risks. The deadline for all returns due to be submitted to the service around 31 October has therefore been moved to 16 November 2026.
