Luxembourg, March 26th, 2026

NoMachine makes available 8.21.3 to provide fixes for issues affecting previous releases, as well as updates to the OpenSSL third party component.

OpenSSL

OpenSSL libraries shipped by NoMachine client and server packages are now v3.0.19. The full list of CVE patched by OpenSSL v3.0.19 is available on their Official web site https://github.com/openssl/openssl/releases/tag/openssl-3.0.19.

Trouble Reports solved

Here is the complete list of fixes released in version 8.21.3:

TR07W11489 - On RHEL 10, creating a virtual desktop may not be possible
TR01X11699 - Possible unexpected termination of nxnode on Linux
TR07V11189 - Unwanted scrolling when scrolling a page with two fingers in a web session

Supported Platforms

Windows 32-bit/64-bit 7/8/8.1/10/11
Windows Server 2008/2012/2016/2019/2022

Mac OS X Intel 64-bit 10.9 to 10.11/macOS Intel 10.12 to 15/macOS Apple Silicon 11 to 15

Linux 32-bit and 64-bit
RHEL 6.0 to RHEL 9
CentOS 6.0 to CentOS 8.5
CentOS Stream 8 to CentOS Stream 10
SLED 11 to SLED 15
SLES 11 to SLES 15
openSUSE 11.x to openSUSE 15.x
Fedora 10 to Fedora 42
Debian 5 to Debian 12
Ubuntu 8.04 to Ubuntu 25.04

Raspberry Pi 2 ARMv6/ARMv7
Raspberry Pi 3 ARMv6/ARMv7/ARMv8/
Raspberry Pi 4 ARMv7/ARMv8
Raspberry Pi 5 ARMv7/ARMv8

ARMv7/ARMv8

Important Notice

Customers of Enterprise Cloud Server Cluster v8 who wish to upgrade to v9 should refer to the instructions at: https://www.nomachine.com/AR11V01257. 'Online' subscriptions v9 for the enterprise products require a NoMachine server v9 and are not compatible with servers v8 or earlier. Please do not hesitate to contact us via any of the available channels for assistance. 

Download NoMachine Packages

Customers with valid subscriptions can log in to their User Area and download the appropriate server package for their subscription from the Enterprise > Downloads section. Note that Support Contacts are no longer entitled to access packages from the Customer's User Area.

Automatic updates

The automatic check for updates is scheduled to check our repositories every two days.

To update the free NoMachine package:

• - Open the NoMachine User Interface from your Programs Menu.
• - From the Machines panel click on 'Settings', then on 'Server' and finally on 'Updates'.
• - Then click on the 'Check now' button.

To update the NoMachine Enterprise Client immediately:

• - Click on 'Settings', from the Player panel click 'Updates'.
• - Then click on the 'Check now' button.

More information about the check for automatic updates is available here:

https://www.nomachine.com/AR05M00847

Manual package installation or update

Please follow the instructions to install the package or update your installation manually:

On Windows:

• - Download and save the EXE file.
• - Double click on the NoMachine executable file.
• - The Setup Wizard will take you through all steps necessary for installing or updating NoMachine.

On macOS:

• - Download and save the DMG file.
• - Double-click on the Disk Image to open it and double-click on the NoMachine program icon.
• - The Installer will take you through through all steps necessary for installing or updating NoMachine.

On Linux:

You can use the graphical package manager provided by your Linux distribution or update NoMachine by command line by following instructions below. If you don't have the sudo utility installed, log on as superuser ("root") and run the commands without sudo.

RPM

- Download and save the RPM file.

- Install the package by running:
# rpm -ivh <pkgName>_<pkgVersion>_<arch>.rpm 

or update your NoMachine installation by running:
# rpm -Uvh <pkgName>_<pkgVersion>_<arch>.rpm

DEB

- Download and save the DEB file.

- Install the package by running:
$ sudo dpkg -i <pkgName>_<pkgVersion>_<arch>.deb 

or update your NoMachine installation by running:
$ sudo dpkg -i <pkgName>_<pkgVersion>_<arch>.deb

TAR.GZ

- Download and save the TAR.GZ file.

- Install the package by running:
$ cd /usr
$ sudo tar xvzf <pkgName>_<pkgVersion>_<arch>.tar.gz
$ sudo /usr/NX/nxserver --install

or update your NoMachine installation by running:
$ cd /usr
$ sudo tar xvzf <pkgName>_<pkgVersion>_<arch>.tar.gz
$ sudo /usr/NX/nxserver --update

If you are installing Enterprise Client or Node run respectively:
$ sudo /usr/NX/nxclient --update
$ sudo /usr/NX/nxnode --update

Documents

Installation and configuration guides for the NoMachine products v8 are available in the Knowledge Base in the 'Documents' section:

https://kb.nomachine.com

The NoMachine Development Team