After more 2 000 000 (two million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions
A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome

2026-04-01: After 1.7.x, 1.8.x release builds need tests and feedback: https://forum.uvnc.com/viewtopic.php?t=38158

2026-03-11: CVE-2026-3787 and CVE-2026-4962 - Clarification: https://forum.uvnc.com/viewtopic.php?t=38155

2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page

2025-05-06: Forum password change request: https://forum.uvnc.com/viewtopic.php?t=38078

2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864

Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome

Help is very needed for:
Windows ARM/ARM64 support: https://forum.uvnc.com/viewtopic.php?t=38163 / https://github.com/ultravnc/UltraVNC/issues/346
macOS support: https://forum.uvnc.com/viewtopic.php?t=38164 / https://github.com/ultravnc/UltraVNC/issues/347
Linux support: https://forum.uvnc.com/viewtopic.php?t=38165 / https://github.com/ultravnc/UltraVNC/issues/348
*BSD support: https://forum.uvnc.com/viewtopic.php?t=38166 / https://github.com/ultravnc/UltraVNC/issues/349
*Solaris support: https://forum.uvnc.com/viewtopic.php?t=38167 / https://github.com/ultravnc/UltraVNC/issues/350

UltraVNC 1.4.0.9 - Feedback

lwc
40
40
Posts: 102
Joined: 2006-08-08 11:00

Re: UltraVNC 1.4.0.9 - Feedback

Post by lwc »

Thanks! Can you add an online generator for me to try (uploadX.pl)?

Anyway, I don't understand something. After the end user enters the ID, a small question asks for it again (in a text I can't change), why does the end user have to write it manually twice?
It doesn't seem to matter at all what I put in the first screen. Only the second one matters:
Image => Image

Also, why does it warn me (which doesn't happen in non-repeater mode)?
Image

Moreover, do I need to also add [DIS_UAC] to helpdesk.ini?

In addition, If I want it secured, should it be -secureplugin -autoreconnect ID:[ENTERCODE] -repeater support2.uvnc.com:5500 ?
Image

Last but not least, why is it hardcoded to the word Connect? Why can't I translate it?
Image
Rudi De Vos
Admin & Developer
Admin & Developer
Posts: 7017
Joined: 2004-04-23 10:21
Contact:

Re: UltraVNC 1.4.0.9 - Feedback

Post by Rudi De Vos »

You are correct, some things need to be removed for SC.

Integrating it in winvnc was a hell of a job, it still need some fine tuning.
You are actual the first that give me usual information back, thanks.

I will check it.
UltraVNC links (join us on social networks):
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/
Rudi De Vos
Admin & Developer
Admin & Developer
Posts: 7017
Joined: 2004-04-23 10:21
Contact:

Re: UltraVNC 1.4.0.9 - Feedback

Post by Rudi De Vos »

SC 2.0 based on 1.4.0.11:
- https://uvnc.eu/download/1400/winvnc_SC20_14011.zip

*Extra window to ask for the id for a second time not needed, code modified

*Connect button could be translated
Added more samples to helpdesk.txt file, was already in the code, not in sample

*Accept without autentocation, this is a viewer option
tab security
[v] Only servers with passwords <<<<uncheck
UltraVNC links (join us on social networks):
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/
lwc
40
40
Posts: 102
Joined: 2006-08-08 11:00

Re: UltraVNC 1.4.0.9 - Feedback

Post by lwc »

Thanks! But this link gives a 404 message. Can you give a usual online generator instead?

About "Accept without authentication", why is there no warning in direct (i.e. no-repeater) connections?
Image
Rudi De Vos
Admin & Developer
Admin & Developer
Posts: 7017
Joined: 2004-04-23 10:21
Contact:

Re: UltraVNC 1.4.0.9 - Feedback

Post by Rudi De Vos »

I broke all downloads...added wrong rule rule
Corrected, posisble still cached on browsers

Using the zip and exe is a lot faster to test, you can see on the fly your helpdesk.txt changes.
UltraVNC links (join us on social networks):
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/
lwc
40
40
Posts: 102
Joined: 2006-08-08 11:00

Re: UltraVNC 1.4.0.9 - Feedback

Post by lwc »

Rudi De Vos wrote: 2023-04-02 18:03 Using the zip and exe is a lot faster to test, you can see on the fly your helpdesk.txt changes.
Very true, but it also means no digital signature...

Anyway, I confirm the extra window is skipped now, thanks! (also confirming you've added [DIS_UAC] though I won't know it works until I test it with someone).

Can you tell me why "Accept without authentication" isn't needed for direct (i.e. non-repeater) connections?

Also, the popup Gibberish is still Gibberish, not Unicode.
Rudi De Vos
Admin & Developer
Admin & Developer
Posts: 7017
Joined: 2004-04-23 10:21
Contact:

Re: UltraVNC 1.4.0.9 - Feedback

Post by Rudi De Vos »

Someone can put a fake server on the net without a password and try to inject code using the viewer.

Last year we got some notifications about fake server.
A fake server actual try to overflow the viewers by sending huge screen sizes and off screen updates.
Viewer was verified and many possible secirity issue's were solved... and also this warning was added.
A server without a password is possible not the server you want to connect to.

I tried the popup with éûù chars and it works.
Else share your helpdesk.txt file (without HOST section) to verify.
UltraVNC links (join us on social networks):
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/
lwc
40
40
Posts: 102
Joined: 2006-08-08 11:00

Re: UltraVNC 1.4.0.9 - Feedback

Post by lwc »

Sure, you can see it at https://pastebin.com/iq0KefeP.

As for fake, direct connections can be fake as well (especially if you use a DNS server).
VNCHELP890
40
40
Posts: 79
Joined: 2022-01-18 16:46

Re: UltraVNC 1.4.0.9 - Feedback

Post by VNCHELP890 »

Rudi De Vos wrote: 2023-03-22 19:35 MSOiD:

Code: Select all

QueryAccept=2
QueryIfNoLogon=0
Found and fixed in 1.4.0.10.
There is a 1.4.0.10?
Not seeing it in any of the usual places.

OK to stick with 1.4.0.9 for a while? Still converting people over from older versions to 1.4.0.9, such as:
1.4.0.8
1.4.0.7
1.4.0.6
1.3.8.2
1.3.8.1
1.3.4.2
1.3.2
1.2.2.4
1.2.1.2
Any urgency to any of these, due to security concerns/vulnerabilities?

Thank you.
Rudi De Vos
Admin & Developer
Admin & Developer
Posts: 7017
Joined: 2004-04-23 10:21
Contact:

Re: UltraVNC 1.4.0.9 - Feedback

Post by Rudi De Vos »

Rudi De Vos wrote: 2023-03-24 20:39 UltraVNC 1.4.0.10 TEST:
- Security fix
- QueryIfNoLogon fix
- MS-Logon I fixes

Downloads:
- https://uvnc.eu/download/1400/UltraVnc_14010.zip
- https://uvnc.eu/download/1400/UltraVNC_ ... _Setup.exe
- https://uvnc.eu/download/1400/UltraVNC_ ... _Setup.exe
Security fixes are for the Viewer. If you connect to a fake Server then they can overrun some memory buffers:
- If the Server is 800x600 and you update a pixel at 801,600 or Server sends a screen size of 1280000x8000000

If possible verify this Server fix: Allow/reject it.
UltraVNC links (join us on social networks):
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/
lwc
40
40
Posts: 102
Joined: 2006-08-08 11:00

Re: UltraVNC 1.4.0.9 - Feedback

Post by lwc »

lwc wrote: 2023-04-03 17:13 Sure, you can see it at https://pastebin.com/iq0KefeP.

As for fake, direct connections can be fake as well (especially if you use a DNS server).
Hi, just wondered if there's any update?
lwc
40
40
Posts: 102
Joined: 2006-08-08 11:00

Re: UltraVNC 1.4.0.9 - Feedback

Post by lwc »

Ludovic
Admin & Developer
Admin & Developer
Posts: 188
Joined: 2021-12-28 18:55

Re: UltraVNC 1.4.0.9 - Feedback

Post by Ludovic »

Dear all,

I do a comment on this old feedback topic, it is possible that your historical feedback have been forgotten (yes, badly, it is possible).

Please try the latest UltraVNC version and do not hesitate to publish your feedback, it can be same that previous which have not been solved...
- https://forum.uvnc.com/viewforum.php?f=56

All your remarks are important...

You can look on opened/closed tickets, search, comment or create a new ticket on GitHub too:
- https://github.com/ultravnc/UltraVNC/issues
UltraVNC links (join us on social networks):
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/
Locked