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Data breach at major Swedish software supplier impacts 1.5 million

ID: 73df807d-112e-5261-bcc1-4da0d2517efd

STIX ID: report--73df807d-112e-5261-bcc1-4da0d2517efd

Feed Name: Bleeping Computer

Threat Score
78/100

Date Published: 2025-11-04

Date Updated: 2026-07-18

Author: Bill Toulas

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Miljödata, an IT systems supplier used by roughly 80% of Sweden's municipalities, suffered a cyberattack that exposed personal data for up to 1.5 million people; attackers demanded 1.5 BTC and a 224MB archive of stolen records was later posted on a dark web portal linked to the Datacarry group, causing operational disruptions across multiple regions and prompting investigations by IMY, CERT-SE and police with potential GDPR inquiries.

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