From time to time, you’ll find here the latest changes and newest features for what will come in the next release. These ‘release candidates’ have a limited lifespan, an expiration date. Not to be confused with your 30-day demo period, release candidates expire on a specific date that it will announce to you each time you run it, something like this:
By that time, either a NEW release candidate will be announced (on this page) or the release candidate will become final and posted to the normal download section of the website.
Current Release Candidate: AbsoluteTelnet 13.13 RC2
Deployed Date: October 20, 2025
Expiration Date: November 18, 2025
Download links:
64 bit: https://www.celestialsoftware.net/telnet/AbsoluteTelnet13.13RC2.exe
32 bit: https://www.celestialsoftware.net/telnet/AbsoluteTelnet32.13.13RC2.exe
This release candidate for version 13.13 contains the following changes:
RC1
- Added support for post quantum key exchange including
- sntrup761x25519-sha512
- mlkem768x25519-sha256
- Added support for AEAD ciphers including aes128-gcm@openssh.com
- Added support for curve25519-sha256 key exchange
- Fixed an issue where cisco ssh server was complaining about channel window adjust messages coming too early: “Remote Server Disconnected: Out of context message type 93“
- Update for windows 11 build 26200
RC2
- Fixed invalid Terrapin warning on server-initiated key exchange
- promote NEW ciphers and kex when older configs are loaded