The ZEIT wallet IS in a way vulnerable that i bet none of you is using because you have not heard of the feature AND use it in that specific way.

If you use the RPC port, have RPCSSL enabled AND use the RPC port naked on the outside of your machine or to the internet (i don't know why anybody would ever do that, but whatever) then yes, your wallet is fucked. Otherwise. Nothing changes.

But of course there is that feature. So sooner or later all the coins will update their wallets. I will not go on to explain linking against different libraries (which is the reason that should motivate you to update your system). If this is not enough for you. Get the wallet source and compile it against openssl-1.0.1g. Done.