What vulnerabilities would you imagine there to be in an unmanaged (aka: dumb) switch? Someone can force the switch to flood all traffic to all ports?
Bearing in mind that switches generally have special-purpose hardware that's responsible for handling switching, I find it unlikely that cheapass dumbswitches have enough CPU to copy LAN data and send it out to a remote system at any useful speed.
Also, next time you're looking for a switch (or if you're still within the return period for your used switch), consider Mikrotik switches. I've had four CRS326-24G-2S+ units for three, maybe five years now and I'm quite happy with them. However, I know nothing about their routers or WiFi APs.
Bearing in mind that switches generally have special-purpose hardware that's responsible for handling switching, I find it unlikely that cheapass dumbswitches have enough CPU to copy LAN data and send it out to a remote system at any useful speed.
Also, next time you're looking for a switch (or if you're still within the return period for your used switch), consider Mikrotik switches. I've had four CRS326-24G-2S+ units for three, maybe five years now and I'm quite happy with them. However, I know nothing about their routers or WiFi APs.