That makes sense, cant access linksys website now to check (glad I got this binary in time :P) binwalk says "Squashfs filesystem, little endian, version 3.0" so I'm going to dl that and try again. Who knows, if I can get this to work, I can make a new wifi cracking script[0] that wont take hours with the vulns found so far by going through the backdoor, for security research purposes of course ;)

[0] https://github.com/cinquemb/WifiBruteCrack/blob/master/wifi_...