Fox and CNN are mainstream Tabloid.
"Tabloid" is an exaggeration. They're both biased sources with at least an established history of doing unethical things. But like, if you pluck out the average Fox or CNN article at random, it probably isn't full of blatantly false information. Same thing can't be said about other sites (Breitbart, Huffington Post, cnn, NaturalNews, etc).
I watch neither CNN nor Fox, but the only reason I'll defend their credibility is because this whole 'fake news' meme is tied pretty much inseparably to people's hate towards those two networks, and they use it as an excuse to deflect actually legitimate criticism towards the current administration.