Miljödata Breach
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 Data
Recommended Actions
Use a password manager to generate and store strong, unique passwords for all your accounts. 1Password helps protect your data with industry-leading security.
Try 1PasswordBreach Overview
-
Affected Accounts:
870.1 thousand
-
Breach Occurred:
August 2025
-
Added to HIBP:
16 Sep 2025
Recommended Actions
Change Your Password
If you haven’t already changed the password affected by this breach, do so immediately on every account where it was used.
Enable Two-Factor Authentication
Wherever 2FA is supported, add an extra layer of security to your account.
Use a password manager to generate and store strong, unique passwords for all your accounts. 1Password helps protect your data with industry-leading security.
Try 1Password