This vulnerability doesn't impact routers with default settings (according to the post). The vulnerability only arises when a router is specifically configured

This vulnerability doesn't impact routers with default settings (according to the post). The vulnerability only arises when a router is specifically configured to function as an endpoint device in IPv6, rather than its default setting as a router. If you set your default GW statically or using some routing protocol, you're fine. And PS: One of my routers that I just checked is running 7.9beta4, and the next available version (testing) is 7.10beta5. In the blog post they said that the fix is in 7.10beta7