Somebody posted a bunch of exploits on GitHub that claim to be 0days.
https://github.com/bikini/exploitarium
Let's look at the first one: A 7-Zip MotW bypass.
Problem
#1: 7-Zip DOESN'T EVEN WRITE MOTW FOR EXTRACTED FILES BY DEFAULT. This doesn't have a CVE, because apparently CVE is difficult.
Problem
#2: If you are a security-conscious person who enabled writing MotW in 7-Zip extracted files (contratulations!), you might notice that the archive contains a :Zone.Identifier:$DATA (MotW ADS) file in it and recognize shenanigans.
Problem
#3: When you extract the file, you will be presented by the following dialog asking if you want to overwrite the ::DATA (primary data stream) of the file. And if you got this far, you're a security-conscious person, so you won't do this.
If you get past all of those hurdles, and click Yes in the dialog, then yes, you'll have a file extracted from a RAR that came from the internet that contains an attacker-controlled MotW (that says it didn't come from the internet).
Is this a vulnerability? Sure. But it both relies on a non-default 7-zip configuration, and it also relies on user interaction to succeed. As such, I can't say that I'm terribly interested in it.
How about the other 22 exploits in the repo? I skimmed through a few, and some seem quite contrived (sort of like the 7-zip one), but some may be legit.
But alas, I don't have the mental fortitude to sift through it all, based on what I've seen. Maybe somebody else here will.