  We present Hubble Space Telescope (HST) near-infrared photometry of the
coldest known brown dwarf, WISE J085510.83$-$071442.5 (WISE 0855$-$0714). WISE
0855$-$0714 was observed with the Wide Field Camera 3 (WFC3) aboard HST using
the F105W, F125W, and F160W filters, which approximate the $Y$, $J$, and $H$
near-infrared bands. WISE 0855$-$0714 is undetected at F105W with a
corresponding 2$\sigma$ magnitude limit of $\sim$26.9. We marginally detect
WISE 0855$-$0714 in the F125W images (S/N $\sim$4), with a measured magnitude
of 26.41 $\pm$ 0.27, more than a magnitude fainter than the $J-$band magnitude
reported by Faherty and coworkers. WISE J0855$-$0714 is clearly detected in the
F160W band, with a magnitude of 23.90 $\pm$ 0.02, the first secure detection of
WISE 0855$-$0714 in the near-infrared. Based on these data, we find that WISE
0855$-$0714 has extremely red F105W$-$F125W and F125W$-$F160W colors relative
to other known Y dwarfs. We find that when compared to the models of Saumon et
al. and Morley et al., the F105W$-$F125W and F125W$-$F160W colors of WISE
0855$-$0714 cannot be accounted for simultaneously. These colors likely
indicate that we are seeing the collapse of flux on the Wien tail for this
extremely cold object.
