Massive Data Breach at Swedish Software Supplier Exposes 1.5 Million Users

You won't believe it! A major Swedish software company called Miljödata has been breached - and it's not small news. The company's systems were breached, and hackers stole data for approximately 1.5 million people. That's more than most populous cities!

Miljödata has the software used by 80% of Sweden's cities and towns, so if the breach largely affected public servants (like educators or office workers), you can imagine how people might be affected.

What Exactly Happened In The Breach​

The company reported the cyber attack occurred in August in 2025. The hackers demanded a ransom of 1.5 Bitcoin (worth thousands of dollars).

According to the company, the stolen data included the following:

• Names and email addressez
• Home addresses and phone numbers
• Government ID numbers
• Dates of birth

In other words, enough data for identity theft. Some have reported around 870,000 confirmed to be impacted. However, the actual number could be significantly higher.

Why This Is Significant​

I have always believed that software the government uses is completely secure, but this case illustrates that there is no perfect system. When a software company serves multiple municipalities and is attacked and compromised, that vulnerability affects millions of individuals with just one attack.

Have you ever thought about what happens if your municipality's data is compromised? In a worst-case scenario, your personal information could end up being sold on the dark web, and you might never know your information was stolen until something strange happens, such as an outrageous leaked credit card bill or a strange email.

A few points to consider

• Approximately 1.5 million people may have been impacted.
• The hackers demanded payment of 1.5 Bitcoin to keep quiet.
• The compromised personal data included identifiers, emails, and physical addresses.
• This breach illustrated how one software supplier could put thousands of users in jeopardy.

Concluding Point​

Definitely a big breach. If I were you, I would find out if my municipality uses the Miljödata software (or software from another vendor that provides similar services) and follow all alerts related to your personal data. I will follow how the investigation goes, and you may want to do the same.