Misinformation is the spreading of wrongful information without intentionally doing so. It can be a simple matter of getting the facts wrong, misremembering some details or sharing a meme.
Disinformation, on the other hand, is deliberate and without regard for second or third-order effects. Russia spreading conspiracy theories on social media to sow discord in other countries is one example; fraud scams are another. Intent makes all the difference. Malice or nefarious intent generally accompanies disinformation while misinformation stems from a generally innocent source.
Disinformation, like misinformation, is everywhere. Plain and simple. It is plentiful in all communities—especially intelligence—and across the globe.