Veyon Community Forum

We're happy to announce Veyon 4.9.7, the seventh maintenance release of Veyon 4.9.x. It introduces optimized bandwidth calculation for demo mode based on type and speed of the network link. The Entra ID Connector (part of Veyon Add-ons) received improved Intune support to query MAC addresses on-demand when powering on computers. All downloads for this release are available in the download area. A complete list of changes in detail can be found below: General: Improved compatibility with Qt 6.9 and 6.10 Plugins Demo: calculate internal bandwidth limit according to network speed and link type (i.e. use half the bandwidth of 100M/1G/2.5G Ethernet links and quarter the bandwidth of wireless links) PowerControl: modernized Wake-on-LAN implementation and added debug messages Linux: Add Debian 13 packages Add RHEL 10 packages Drop Ubuntu 20.04 packages Windows: 3rdparty: libpng: update to 1.6.50 3rdparty: libjpeg-turbo: update to 3.1.1 3rdparty: OpenSSL: update to 3.5.2

Hello, I am writing to report a critical security vulnerability in the Veyon lock screen feature. The lock screen can be completely bypassed using a specific keyboard shortcut. Please note that English is not my first language. I have done my best to describe the issue clearly below. Description: The Veyon lock screen does not block the Windows Key + Alt + D (Win+Alt+D) shortcut. Pressing this combination will bypass the lock and provide full access to the desktop. Steps to Reproduce: Lock a computer session using Veyon. On the active lock screen, press the Win + Alt + D keys together. Observe that the Windows "New Desktop" feature is triggered, effectively hiding the Veyon lock screen and granting access to the original desktop. Expected Result: The lock screen should disable all system-level keyboard shortcuts and remain secure. Actual Result: The Win+Alt+D shortcut is allowed to execute, creating a new virtual desktop and bypassing the lock screen's protection. Environment: Veyon Version: 4.9.7 Operating System: Windows 10 Thank you for looking into this issue. This is a serious security flaw that compromises the integrity of the lock screen. I hope this report helps in resolving it promptly. [image: 1762754663493-90ac5b97-d664-418a-b65b-eec13c14260b-image.png] [image: 1762754670705-b8a2aeec-7aa6-4d50-ae8d-0412d9c3716a-image.png]

Subject: Screen Broadcasting Shows Black Screen with Blue Circle on Student Clients in Dual Monitor Setup Hello Veyon Community, I am experiencing an issue with screen broadcasting in a dual-monitor classroom environment and would appreciate any help. My Setup: Teacher Computer: Running Veyon Teacher. Monitors: A drawing tablet (1080p resolution) used for lecturing and writing. I want to broadcast only this screen to students. A regular monitor used to run Veyon Master for monitoring student screens during class. The Problem: Whenever I start a screen broadcast from the teacher computer, the student clients receive a black screen with a blue loading circle in the center. The broadcast is also extremely laggy and unusable. Current Workaround: To make it work, I have to connect the drawing tablet to a separate student computer. I then use the teacher computer to broadcast that specific student's screen to all other students. This method works correctly, but it is not an ideal solution. My Question: Is it technically impossible to achieve this (broadcasting one specific screen directly from a dual-monitor teacher computer) within Veyon? I would like to understand if this is a known limitation, a configuration issue, or a potential bug. Any insights, suggestions, or configuration guidance would be greatly appreciated. Thank you!

Hi everyone, I’d like to share a small community contribution that might be useful for schools and parents who run Veyon on Windows devices (especially student BYOD devices without local admin rights). GitHub repository: h tt ps://github . com/Railsimulatornet/VeyonAutoupdateforWindows What it does The script package provides an automatic Veyon update mechanism on Windows using WinGet. It: runs at system startup as a scheduled task (SYSTEM account) checks the online Veyon version via winget only updates when a newer version is actually available creates a configuration backup before updating (with rotation of recent backups) writes a detailed log file under C:\ProgramData\Veyon\Update\ The goal is to keep Veyon up to date on many devices without manual intervention, while preserving the existing configuration. Key features Version check instead of blind updates The script compares the installed Veyon version with the version reported by WinGet and only triggers an update when the online version is newer. Silent upgrade via WinGet Uses winget upgrade VeyonSolutions.Veyon with silent and non-interactive switches, so students don’t see any installers popping up. No unwanted Veyon Master installation If Veyon Master was not installed before, it will not be installed by the updater. A custom parameter is appended so the existing component selection is respected. Configuration backup + rotation Before an actual upgrade, the script exports the configuration (JSON via veyon-cli config export or a registry backup as fallback) and keeps only the last few backups to avoid uncontrolled growth. Robust logging & log trimming A central log file records each run including exit codes. When the log reaches a certain size, older entries are trimmed so it doesn’t grow indefinitely. Idempotent / safe to run repeatedly If the machine is already on the latest version, nothing is changed (no backup, no reinstall, no UI). If a PC is turned off during an upgrade, the check simply runs again at the next boot and retries if still outdated. Requirements Windows 10/11 with App Installer / WinGet available Veyon 4.x / 4.9.x installed (Master optional) Installation (short version) Download the ZIP from the GitHub Releases section. Unzip it and run Install-Veyon-AutoUpdate.cmd as Administrator. This copies the files to C:\ProgramData\Veyon\Update\ and creates a scheduled task that runs at system startup (with a short delay). From the next reboot on, Veyon will be checked and – if needed – updated automatically. To remove everything again, run Remove-Veyon-AutoUpdate.cmd as Administrator (task + files are cleaned up).