Personally I rotfled when I saw these. With unrestricted admin rights and ability to flash systems bios you can do anything at all.
In fact, LETS ALL CREATE A NEW RESEARCH GROUP then " discover " that if you bios flash the intel mobos bios to a version before its anti-meltdown update then use administrative rights to rollback the system update, why not, you have the rights OMG OMG THIS CREATES MELTDOWN 2.0 OMG OMG. Intel must be bad then, don't buy intel, its stock must be "0.0$".
But lets be serious, with admin rights you can upload a custom service that will run any command as nt authority / system account. With that you can copy move delete and edit any file, partition or memory space and with a modified yet somehow still signed driver theres nothing you cant do. You can run 50 amps through a chipset, zero-out drive firmware, create new invisible partitions, put undetectable apache server on them and run some hacked edition of pornhub from victims computer. On ANY CPU, motherboard or even system(as Linux root will allow mostly the same thing).
I suspect they didn't "find" or "Research anything". Someone at CTF got these sneaky details illegaly of engineers then publish it for monetary gains.