That said, existing YubiKey owners don't need to discard their devices. The attack in question requires significant resources – around $11,000 worth of specialized equipment – and advanced expertise in electrical and cryptographic engineering. It also necessitates knowledge of the targeted accounts and potentially sensitive information such as usernames, PINs, account passwords, or authentication keys.
"The attacker would need physical possession of the YubiKey, Security Key, or YubiHSM, knowledge of the accounts they want to target, and specialized equipment to perform the necessary attack," the company
noted in its security advisory.