What was exposed, when it happened, and which databases confirm it.
- accounts
- 870,108
- Breached
- August 25, 2025
- Last Update
- September 16, 2025
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
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.
Compromised Info
- Dates of birth
- Email addresses
- Genders
- Government issued IDs
- Names
- Phone numbers
- Physical addresses
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- HIBP
FAQ
What was leaked in the Miljodata breach?
The Miljodata breach exposed: Dates of birth, Email addresses, Genders, Government issued IDs, Names, Phone numbers, and Physical addresses.
When did the Miljodata breach happen?
The Miljodata breach was disclosed on August 25, 2025 and affected 870,108 records.
Am I affected by the Miljodata breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the Miljodata leak.