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Miljödata data breach — are you affected?

In August 2025 the Swedish system supplier Miljödata fell victim to a ransomware attack and data was later published on the dark web. It covers about 870,000 unique email addresses spread over several files, with names, phone numbers, postal addresses, birth dates and Swedish personal identity numbers.

Key facts
Verified
Breach date
25 August 2025
Accounts affected
870,108
Added to catalogue
16 September 2025
Website
miljodata.se

Data exposed

  • Government-issued IDs, high risk
  • Dates of birth, medium risk
  • Phone numbers, medium risk
  • Physical addresses, medium risk
  • Email addresses, lower risk
  • Genders, lower risk
  • Names, lower risk

Colour shows how damaging the data is if misused.Credentials, ID and bank dataContact and personal detailsOther profile data

What this means for you

Based on the types of data in this breach, in order of importance.

  • Stay alert to identity fraud

    Birth dates and identity document numbers cannot be changed like a password. Be wary of anyone who quotes them to sound legitimate, check bank statements and credit reports regularly, and use a credit-file freeze or fraud alert where your country offers one.

  • Watch for smishing and SIM-swap attempts

    A leaked phone number lets criminals send convincing text messages and try to take over the number. Do not tap links in unexpected SMS, set a PIN with your mobile carrier and prefer an authenticator app to SMS codes.

  • Expect phishing letters and delivery scams

    A physical address makes impersonation more believable and enables fake letters and parcel notices. Treat unexpected post or delivery messages asking for money or details with suspicion, and check anything official on the sender’s own website.

  • Expect more targeted phishing

    Your email address ties you to this service, which is enough for a believable message such as a fake account warning. Check the sender and the web address before you sign in, and go to the site directly instead of using links in email.

  • Limit what attackers can personalise

    Names, employers, job titles and social profiles make impersonation and spear-phishing easier. Check what your public profiles reveal, and be careful with unexpected requests that use your real name or workplace.

Check your own email address

Run a free self-assessment for an email address you own. VINDICIS checks it against infostealer logs and several public breach sources and shows a summary in seconds.

Built for your own addresses. It is not a tool to look up other people.

Run a free self-assessmentCheck a password

Related breaches

Breaches that exposed similar kinds of data.

Frequently asked questions

Was my data in the Miljödata breach?

Only a check of your own address can tell. If you had an account with Miljödata around 2025, assume it might be. Run the free self-assessment with an email address you own: VINDICIS checks it against several public breach sources and shows a summary in seconds. It is built for your own addresses, not for looking up other people.

What information was exposed in the Miljödata breach?

According to the Have I Been Pwned catalogue, the Miljödata breach affected 870,108 accounts and exposed: Government-issued IDs, Dates of birth, Phone numbers, Physical addresses, Email addresses, Genders, Names. The incident dates from 25 August 2025.

What should I do if I had a Miljödata account?

Review the security settings of your Miljödata account and treat unexpected emails, texts or letters that mention Miljödata with suspicion. Delete the account if you no longer use it.

Is it safe to check my email address on VINDICIS?

Yes. The free scan is not stored or logged, results stay in memory for four hours at most, and your browser only talks to this site. The password checker hashes locally and sends only five characters of the hash, so the password never leaves your device.