Back-focus is usually not a universal flaw of a camera model by itself; it most often shows up in a specific camera-and-lens combination using phase-detect autofocus. So a D7000 is not guaranteed to have the issue, but an individual body with certain lenses might.

The good news is that the D7000 includes AF Fine Tune (microadjustment), which lets you calibrate autofocus for individual lenses. Several users report that this can solve the problem, though it may take some time to dial in.

If a lens/body combination needs more correction than the camera’s adjustment range allows, the usual next step is Nikon service calibration. Sending the camera, and ideally the affected lenses, to service is the standard workaround.

So yes, autofocus miscalibration can happen on some D7000 bodies, but it is often fixable either through AF Fine Tune or professional calibration. The practical advice is to test the camera with your lenses after purchase and verify focus accuracy.