UltraVNC

Version 1.8.0.6 – April 2026
- FileTransfer folder transfer fix
- OpenSSL 3.6.2
- libsodium 1.0.22
- setpasswd/createpasswd write to %programdata% instead of current folder

Downloads:
- https://uvnc.eu/download/1800/UltraVNC_1806_x86_Setup.exe
- https://uvnc.eu/download/1800/UltraVNC_1806_x64_Setup ...

Folder FT is fixed: 1.8.0.5 was not transferring folders.

stefanorossetti : The password is still in ultravnc.ini.

That's now in %ProgramData% and not longer in the %ProgramFiles% folder.

setpasswd sets the password in the current folder, for now, you need to copy it, temporary, to the same ...

UltraVNC Changelog

Version 1.8.0.5 – April 2026
- FileTransfer needed bigger buffers for UTF-8/UTF-16
- UI Unicode fixes
- Unicode logging
- Baseline lib updates:
* libjpeg-turbo 3.1.4.1
* liblzma 5.8.3
* libsodium 1.0.21
* zlib 1.3.1
* zstd 1.5.7
* openssl 3.6.1

Downloads:
- https://uvnc.eu ...

UltraVNC Viewer: 1.8.0.4
UltraVNC Server: < 1.8.x
- Unicode is disabled as UltraVNC Server doesn't support it
- ANSI mode, does not support international chars

This behave the same as a UltraVNC Viewer 1.4.x or 1.6.x
You see ?????? instead of chars and natural ??? isn't find to copy at all.
Normal ...

RDP: I think it always worked like that. It requires a review but that's not for now. As far is a remember, the Server sometimes need to restart the winvnc in another desktop. To avoid to pass the RDP selection each time some trigger was added, only doesn't work 100%.

Viewer closing. If you can ...

@basso, @wojtek: Mentioned issue's fixed.

Downloads:
- https://uvnc.eu/download/1800/UltraVNC_ ... _Setup.exe
- https://uvnc.eu/download/1800/UltraVNC_ ... _Setup.exe
- https://uvnc.eu/download/1800/UltraVNC_1804.zip

Thanks for the feedbacks.
Missed thoose Unicode convertions, and DSM Plugin in listen mode uses other code, that also needed an update.

UltraVNC 1.8.0.3:
- Keyboard changes: Sync Server and Viewer keyboard handling, this should fix:
❌ Incorrectly handles Cyrillic (0x06a1-0x06ff) - treats as Unicode instead of X11 keysym
❌ Incorrectly handles Greek (0x07a1-0x07f9)
❌ Incorrectly handles Hebrew (0x0cdf-0x0cfa)
❌ Incorrectly handles ...

"Use Encryption" plugin selection and connect -> Fixed

Confirmed: Pressing "Config encryption plugins" button still give the error.

Download:
- https://uvnc.eu/download/1800/UltraVNC_1802_x64_Setup.exe
- https://uvnc.eu/download/1800/UltraVNC_1802_x86_Setup.exe
- https://uvnc.eu/download/1800 ...

Tested and fixed:
- Plugin loading (proper convert the unicode path and pluigin name)
- Password commandline needed to be proper converted to ansi

Updated to 1801, to make sure we test all the same:
- https://uvnc.eu/download/1800/UltraVNC_1801_x64_Setup.exe
- https://uvnc.eu/download/1800/UltraVNC ...

Thanks for testing...

Sorry for the errors, it seems that the unicode conversion of the viewer had some side effect
Viewer is now full unicode, i need to verify if all command lines, special passwords are proper passed.

And plugins also fail to load .... damm

If you find some other let me know ...

The problem was that the Unicode implementaion for Chat and FileTransfer also changed some ultravnc.ini code parts.
During testing I didn't see it as I didn't expected that Chat and FileTransfer changes would touch the service.

Thanks the feedback the problem is solved.

And also made a little ...

Thanks for the feedback
Damm "%ProgramFiles%\UltraVNC Team\UltraVNC Suite this should not be the path.

We have been playing to get UltraVNC passes the MS Store certification but folders should have stay the same.
To complex to upgrade.

1.8.0.0 offline

EDIT: Back online
Updated the files ...

Feedbacks for UltraVNC 1.8.0.X in this topic.

UltraVNC 1.8.0.6:
- https://uvnc.eu/download/1800/UltraVNC_1806_x86_Setup.exe
- https://uvnc.eu/download/1800/UltraVNC_1806_x64_Setup.exe
- https://uvnc.eu/download/1800/UltraVNC_1806.zip

Important:
UltraVNC 1.8.x.x versions have compatibility with ...

RDP mode is broken in 1.7.1.11
In 1.7.1.6 it still worked.

Explain, what isn't working:
- RDP Server
- RDP session on a normal PC

The goal is that the new FT use protocol 3 when protocol 4 is not supported

Information about CVE-2026-3787:
- https://www.cvedetails.com/cve/CVE-2026-3787/

The prerequisites are significant:
- An attacker needs to place a fake cryptbase.dll in the application directory (e.g. C:\Program Files\UltraVNC).
To be able to do that he needs "write access" to the install directory ...

Don't get copy/paste proper working.

Update FT window:
- unicode support
- unaccessible folder are red

UltraVNC 1.7.1.10-dev:
- https://uvnc.eu/download/1710/UltraVNC_17110-dev.zip
- https://uvnc.eu/download/1710/UltraVNC_17110_x64_Setup.exe
- https://uvnc.eu/download/1710/UltraVNC_17110_x86_Setup ...

I need to work as RDP.
CTRL+C just inform Server.
CTRL+V Server need to request Viewer to send file.
A progress dialog needs to show what's going on.

Not finished, redesiging...

ddbivens : Where you testing 1.7.1.6?

FT using copy/paste.

I tested both on LAN.
I using a 1.2 GB file.

FileTransfer: Do you get a popup with the filename and progress?

local CTRL+C and remote CTRL+V?
or
remote CTRL+C and local CTRL+V?
or
Both?

At the bottom, you can find some images:
- https ...

Can't repeat it.
START "" "C:\Users\XXX\Desktop\git_ultravnc\vncviewer\Debug\vncviewer.exe" -listen 55500
this show the viewer on the systray, and i can proper connect:
https://uvnc.eu/download/1710/listen.png

Possible it's related to save config settings.

When do you get the dialog, on start or ...

- https://uvnc.eu/download/1710/UltraVNC_ ... _Setup.exe
- https://uvnc.eu/download/1710/UltraVNC_ ... _Setup.exe

Description updated

I think I found it... one "}" at a wrong place in coded LOL

Will post an update for testing.

This also include:
- unicode chat
- copy paste of a file, could be handy if you quick want to copy a small file

Thanks for the feedback!

1.7.1 is still alpha, only use for internal testing.

Was viewer and server replaced or only the viewer?

This limit the bug chase.

Description updated

You are correct... seems I broke something while updating the library

Not offical, but files are online for certification testing:
- https://uvnc.eu/download/1710/UltraVNC_1710-dev.zip
- https://uvnc.eu/download/1710/UltraVNC_1710_x64_Setup.exe
- https://uvnc.eu/download/1710/UltraVNC_1710_x86_Setup.exe

Bridge works like our own P2P until we made but now we use a ...

Feedbacks for UltraVNC 1.7.1.X-dev in this topic.

UltraVNC 1.7.1.11-dev:
- https://uvnc.eu/download/1710/UltraVNC_17111-dev.zip
- https://uvnc.eu/download/1710/UltraVNC_17111_x64_Setup.exe
- https://uvnc.eu/download/1710/UltraVNC_17111_x86_Setup.exe

Important:
UltraVNC 1.7.1.x versions have ...

Train your AI better

vncviewer.exe -password mysecret 1.1.1.1:5900