spoof rsa fingerprint

[Eugeneapolinary Ju]

When I first log in to my router [192.168.1.1] through ssh, it says:

The authenticity of host 'XXXX.XX (192.168.1.1)' can't be established.
RSA key fingerprint is 51:c6:d1:7a:45:c4:74:3e:31:ee:3a:5a:2d:e1:bf:74.
Are you sure you want to continue connecting (yes/no)?

that's OK [it gets stored in the known_hosts file, on my client machine].

But:

what happens, if someone turns off my router, then installs a pc with ip 192.168.1.1?

And! - it spoofs _the same rsa fingerprint_, that was on my router.

Then, when I want to log in to 192.168.1.1, I will type my password, and it will stole my password...


So the question is:

Could that be possible, to spoof the rsa_fingerprint? [because the router say's the fingerprint when first logging in to it, etc..so could that be spoofed?]