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Breach occurred 2025-08-25Verifiedmiljodata.se
What happened
In August 2025, the Swedish system supplier Miljödata was the victim of a ransomware attack. Following the attack, data was subsequently published on the dark web and included 870k unique email addresses across various compromised files. Data also included names, phone numbers, physical addresses, dates of birth and government-issued personal identity numbers.
Data exposed
Frequently asked questions
The Miljödata data breach occurred on August 25, 2025. It was added to Have I Been Pwned's breach catalog on September 16, 2025.
870,108 accounts were affected by the Miljödata data breach, according to Have I Been Pwned's records.
The Miljödata breach exposed the following data types: Dates of birth, Email addresses, Genders, Government issued IDs, Names, Phone numbers, Physical addresses.
Yes. Have I Been Pwned has verified the Miljödata breach, meaning there's confirmed evidence the exposed data is genuine and tied to real accounts.
Use KazaSec's free Email Breach Checker (/tools/breach-check) to check whether a specific email address has surfaced in the Miljödata breach, or any other known breach — the tool never stores what you search.
Our free Email Breach Checker tells you whether a specific email address has surfaced in this breach — or any other known breach — without ever storing what you search.
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