Question about Yubico YubiKey 5 NFC

At the beginning of September, a security vulnerability affecting keys with firmware prior to version 5.7 was discovered. For security reasons, the firmware on these keys cannot be updated. Although this flaw is complex and expensive to exploit and therefore the risk is low, I would like to buy more recent keys with firmware 5.7 or later. Can you confirm that the keys you sell have been produced with firmware 5.7 or later?