With all possible respect, I don't think you have given concrete examples. You have given general examples, and hnlmorg and I have explained why we don't think there are concrete problems to be found there.
The exception is font rendering. I haven't used Supermium specifically and I don't know enough about how it works, but if Supermium is passing remote web fonts directly to the OS for rendering, that needs to stop immediately, and until it does all Supermium users should disable webfonts!
As an aside, if there is in fact something like an exploitable buffer overflow in Windows XP's TCP/IP stack, that is something enthusiasts could probably patch.
The exception is font rendering. I haven't used Supermium specifically and I don't know enough about how it works, but if Supermium is passing remote web fonts directly to the OS for rendering, that needs to stop immediately, and until it does all Supermium users should disable webfonts!
As an aside, if there is in fact something like an exploitable buffer overflow in Windows XP's TCP/IP stack, that is something enthusiasts could probably patch.