The words misinformation and disinformation both exist and have different meanings:
Misinformation, a combination of mis and information, means wrong or misleading information. The prefix mis, as in mistake or misspell, means wrong. Misinformation just shows the spread of wrong information without any mention of the intention behind it.
Disinformation also means wrong or false information, just like misinformation, but it refers to false information spread deliberately with malicious intent and nefarious motivation. This word is used when the focus is on conveying the intent to deceive.