According to BleepingComputer, Swedish software supplier Miljödata suffered a suspected ransomware attack in August 2025 [1]. Citing the company's CEO, the report stated that related systems across roughly 200 municipalities and regions experienced disruptions as a result [1]. Because the affected systems handle sick leave and employee health data, residents and employees should rely on official municipal announcements [1].
This event has not been officially confirmed. Content is based on media or third-party reports.
Backfill: this event became public on Aug 25, 2025 and we added it on Nov 10, 2026. It is not a new event.
HighMonitoringBackfillMedia reported
Swedish Supplier Miljödata Hit by Cyberattack, Affecting Systems Across Roughly 200 Municipalities
1 min read
- Disclosed
- Aug 25, 2025
- Published
- Nov 10, 2026
- Last updated
- Nov 7, 2026
- CVSS basis
- Our assessment
- Attack vector
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Government, Technology
What to do nowOur advice
Because the affected systems handle sick leave and employee health data, residents and employees should rely on official municipal announcements [1].
Timeline
- Incident publicly disclosed[1]
Technical details
Source-Supported Details
The Record and BleepingComputer reported that Miljödata was attacked, impacting systems used by many Swedish municipalities to manage employee sick leave and occupational injury data. This represents a supply chain incident impacting municipal operations [1].
Source excerpt: "Adaptive Security's AI agents analyze email intent, context, and behavior to uncover , business email compromise, and invoice fraud." [1].
References
Media1
- [1]
“Adaptive Security's AI agents analyze email intent, context, and behavior to uncover phishing, business email compromise, and invoice fraud.”
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