I'm sorry, I don't know the bakground of using the different "windows" for the spectrum, but any signals shown in the high frequency area (above the cutoff) are likely spurious/phantom signals and not part of the music. The "Hanning window" in my screenshot shows something there as well, although at a -80 dB level it's clearly not audible.

Anything is possible, but I wouldn't expect a retail CD to show a cutoff at 16 kHz like this.