The Bengals are currently sitting at 5-6, and the last Wild Card spot for the AFC is still very much in play.
Currently, the 6-5 Bills are sitting in the sixth spot, but that is pending the results of the Ravens game tonight. Either way the Bengals are very alive for a postseason appearance, according to Bill Barnwell of ESPN:
3. Cincinnati Bengals (5-6)
Playoff odds: 5.7 percent
Nobody gets excited by the Bengals at this point, but they're quietly rounding into form, especially on offense.