https://arstechnica.com/security/2024/01/millions-still-havent-patched-terrapin-ssh-protocol-vulnerability/

Roughly 11 million Internet-exposed servers remain susceptible to a recently discovered vulnerability that allows attackers with a foothold inside affected networks. Once they're in, attackers compromise the integrity of SSH sessions that form the lynchpin for admins to securely connect to computers inside the cloud and other sensitive environments.