Swedish DPA fines Miljödata i Karlskrona approximately EUR 160 000 for insufficient technical and organisational measures to ensure information security

In August 2025, the IT service provider Miljödata was targeted in a cyberattack, during which a malicious actor gained access to a large volume of personal data and subsequently published data on the darknet. Among Miljödata’s customers affected by the attack are a majority of Sweden’s municipalities, several regions, and government agencies, as well as a large number of private companies. The compromised data included personal identity numbers, contact details, and sensitive data related to sick leave, rehabilitation, and student-related incidents in schools. The review shows that the company did not maintain a sufficiently high level of technical and organizational security, given the types of personal data it processed. Miljödata failed to conduct adequate checks when installing new software and did not have automated real-time monitoring of its systems to detect intrusions or suspicious activity. IMY, the Swedish Data Protection Authority, assesses that Miljödata acted negligently and has therefore decided to impose an administrative fine of SEK 1 800 000 (approximately EUR 160 000) for violating Article 32(1) GDPR.