Well, yes but it isn't actually used for key negotiation - we're dependant there on something built into the Humax firmware which is probably vulnerable.
I can upgrade to wpa_supplicant 2.7 to fix the vulnerability there but we might have to accept that our Humax boxes will always remain vulnerable to this suite of attacks. This would mean that an attacker could potentially decrypt packets sent onto the network by the Humax - not the most confidential stuff in the world.