: This version disabled ineffective UPnP (Universal Plug and Play) actions for IPv6 addresses that previously generated errors.

: Newer versions (9.x) support hybrid post-quantum key exchange (e.g., mlkem768x25519-sha256 ) to protect against future quantum computing threats.

: The primary fix is to upgrade to Bitvise SSH Server version 9.32 or newer, which implements Strict Key Exchange . Security and Functional Fixes in Version 8.48

: In previous versions, if an SCP upload encountered a write error or failed to set file time, the file transfer subsystem would abort abruptly. Version 8.48 corrected this to ensure errors are reported properly without crashing the subsystem.

While Bitvise 8.48 was a solid release for its time, it lacks modern cryptographic protections now standard in the 9.x series: