Miljödata data breach
From Breaches, in the HARD wiki · Updated
This article is about the August 2025 breach of Miljödata. For every breach, see Breaches.
The Miljödata data breach exposed 870,108 accounts from miljodata.se in August 2025. The data taken includes dates of birth, government issued IDs, names and physical addresses and 3 more kinds of data.[1]
Have I Been Pwned verified it and added it to its search on 16 Sep 2025, 1 month later. It is the 433rd largest of the 618 breaches in HARD’s list.
What was exposed
Miljödata’s breach included 7 kinds of data. What each lets criminals do:
| Data | What it’s used for |
|---|---|
| Dates of birth | Used to prove who you are to banks and phone companies. |
| Government issued IDs | Enough to open accounts or take out loans in your name. |
| Names | Makes scam messages personal enough to believe. |
| Physical addresses | Used to prove who you are, and for scam letters and parcels. |
| Email addresses | Expect scam emails that name the company to look genuine. |
| Phone numbers | Expect scam texts and calls, and a higher risk of someone moving your number to their SIM. |
| Genders | Personal details that make scam messages more convincing. |
What to do
- Check whether you’re in it.Search your email address on Have I Been Pwned. It tells you which breaches it appears in, Miljödata among them, without showing the data.
- Distrust messages that mention Miljödata.Scammers use breach data to sound genuine. Don’t click links in emails or texts about the breach; go to the site yourself.
- Put a PIN on your phone account.Ask your mobile provider for a port-out PIN, so no one can move your number to their SIM.
- Freeze your credit.In the US, free at Equifax, Experian and TransUnion. In Australia, ask Equifax, Experian and illion for a ban. No one can open credit in your name while it’s on.
Timeline
- : the breach, as best it can be dated.
- : Have I Been Pwned verifies the data and adds it to its search, 1 month later.
Similar breaches
Breaches that leaked the same kinds of data, closest in time:
- Odido, February 2026, 6.1 million accounts
- JCPenney, June 2026, 368,418 accounts
- Angel One, April 2023, 6.8 million accounts
- AT&T, August 2021, 49 million accounts
- DentaQuest, May 2026, 2.6 million accounts
- Glendale Community College, June 2026, 793,925 accounts
See Breaches for all 618, and Updates for keeping your devices patched.
References
- ^ Troy Hunt. “Miljödata”, Have I Been Pwned, added 16 Sep 2025. Breach data licensed CC BY 4.0.
External links
- Have I Been Pwned, to check your email address
- miljodata.se, Miljödata’s website