Breach Database / Miljödata
Yes — Miljödata was breached.
- 870,108 accounts affected
- Breach occurred 2025-08-25 · miljodata.se
- Verified entry in the Have I Been Pwned catalog
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.
What data was exposed
- Dates of birth
- Email addresses
- Genders
- Government issued IDs
- Names
- Phone numbers
- Physical addresses
What to do right now
- Freeze your credit. A credit freeze at the major bureaus is free and blocks new accounts from being opened in your name.
- Be alert for smishing and SIM-swap attempts. Treat unexpected texts and "carrier" calls with suspicion; add a PIN/port-freeze with your mobile carrier.
- Watch for targeted phishing mail. A leaked home address makes postal and doorstep scams more convincing.
- Expect convincing phishing emails. Attackers use breached details to write personalized emails. Be suspicious of any message referencing this service.
- Check your other accounts on Have I Been Pwned. Your email address may appear in other breaches you don't know about yet.
- Monitor the apps you use going forward. Clearly watches the breach record for the companies behind your apps and alerts you the moment one appears.
Breach data from Have I Been Pwned. Listing here means the service appears in the public breach record — not that your personal data was affected.