The vault tool from Coinbase no longer works:
https://bitcointalk.org/index.php?topic=5316286.0

But if you read to the bottom: https://bitcointalk.org/index.php?topic=5316286.msg62141240#msg62141240

Someone did make a working version at least as of 6 moths ago or so.
I can't comment on the safety of it or if it still works but it did back then.

Once you run the tool if it does work move your coins ASAP.

-Dave