I don't know about Intel, but from everything I have learned over the years about u-feathers (microsoft) I would not be at all surprised if even more backdoors appear as time goes by.
I worked for Intel for 25 years until a year ago.
It used to be one of the finest companies in the world.
The DOJ/EU threatened it with multi-billion lawsuits unless they did what they were told.
After 911 and .com crash, something happened which changed the direction and it got much worse under Obama.