You have a few options. You can wait and pray, ask a miner kindly to include it for you, or contact the exchange's support and ask them to resend with a fee. Your best bet would be to ask a miner, (quickseller or macbook-air can do that, as stated earlier). However, it wouldn't hurt to contact the customer support of the sending exchange and see if they can RBF it. If they can't, you could also ask the receiving exchange if they can CPFP it.
I can do that, but it might be better to replace the TX with one that pays a higher fee.
Reading, sho:
here is what happened, there is a transaction from an exchange wallet to another exchange wallet so we have no access to the private keys of either addresses.
@OP can you post a TX-ID or send me a PM with it?
Yes, that would be very helpful. Better would be to post the raw transaction in case the transaction does disappear so that people who run full nodes (including myself) can rebroadcast it for you.