It's only servers providing DNS which are at risk. Your Windows workstation won't need any dns patches. Your router is simply a dns relay (ie. receives requests from you and passes them on to your ISP).
If your ISP hasn't patched, potentially you could be the victim of dns poisoning if they should be exploited, at which point it's feasible you could type in
Pendleton Community Bank to your browser, and get up a webpage which looks exactly like your bank, but it's not your bank, and most people wouldn't notice the difference. The potential fallout of this one is actually quite scary.
Go here:
DNSstuff: On-demand DNS and network tools to analyze, diagnose and monitor a domain or IP address and run the DNS vulnerability test. It will throw a load of requests at your ISP's DNS servers to check for source port randomisation (which is what you want).