That is not a source that confirms SemiAccurate's claims, it's a nearly decade-old paper (~2008-2009) describing an attack against a completely different securi

That is not a source that confirms SemiAccurate's claims, it's a nearly decade-old paper (~2008-2009) describing an attack against a completely different security feature. The "System Management Mode" described and attacked in the paper is unrelated to Intel ME.