On October 29, 2026, Belgian finance and tax agency, FOD Financien, confirmed it had taken several digital services offline following a cyberattack. Among them was MyMinfin, the main tax portal of the country, along with other online services, which were temporarily unavailable while initial investigations began.
The most immediate consequence was for taxpayers: the October 31 deadline for filing returns on certain types of income, such as those of self-employed workers and income from foreign companies, was extended to November 16, by which time MyMinfin was expected to be back up and running. The agency presented the shutdown as a measure to limit risks and allow the technical work needed to secure its systems.
At the time, the investigation was in an early phase, and the agency said there was no indication of a data leak or that data had been compromised, although that aspect remained under monitoring. Its spokesperson explained that the attack was stopped within hours, that it failed to spread far enough to take control of the applications or access data, and that potentially infected items were isolated, which took MyMinfin, Tax-on-web, and Biztax offline.
Source: The Register (https://www.theregister.com/security/2026/10/29/belgiums-tax-agency-confirms-cyberattack-pulls-services-offline/5306409)
