Cyberattack on IT supplier affects hundreds of Swedish municipalities and regions

The Region of Gotland in Sweden was notified that Miljödata, a Swedish software provider used for managing sick leave and other HR-related records, had been hit by a cyberattack. Later that day, it was confirmed that sensitive personal data may have been leaked, although it remains unclear whether Region Gotland’s data was affected.

Miljödata, which provides systems handling medical certificates, rehabilitation plans, and work-related injuries, immediately isolated its systems and reported the incident to the police. The region of Gotland is one of several regions affected. Investigations are ongoing, and the region is closely monitoring the situation while following standard data protection procedures, according to HR Director Lotta Israelsson.

Swedish Minister for Civil Defence, Carl-Oskar Bohlin, confirmed that the full scope and consequences of the cyberattack remain unclear. Around 200 of Sweden’s 290 municipalities and 21 regions were reportedly affected, many of which use Miljödata systems to manage employee data such as medical certificates and rehabilitation plans.

Miljödata is working with external experts to investigate the breach and restore services. The government is closely monitoring the situation, with CERT-SE and the National Cybersecurity Centre providing support. A police investigation is underway. Bohlin emphasised the need for stronger cybersecurity and announced a forthcoming bill to tighten national cyber regulations.

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