If your router isn’t even a Linksys router, then it’s most likely a false positive result and can be safely ignored. If you want to be extra sure, you could attempt to actually exploit the vulnerability with routersploit and see whether you get anywhere.
In general, the fix for a vulnerability in an end-user network device is some combination of “update the firmware” and “disable the vulnerable feature”.
Please don’t assume that it’s all Russian bot bullshit. Thursday night’s “debate” performance was a catastrophe that affirmed a lot of people’s worst fears, my own included. I just don’t know how he wins after that, and if he can’t win, then I’m sorry but it’s time for an open convention.