About Nx Witness Server
Nx Witness is a fast, cross-platform IP video surveillance management system designed to discover, view, record, and manage IP cameras effortlessly in real-time.
Intelligent Video Management System
Nx Witness is a fast, cross-platform IP video surveillance management system designed to discover, view, record, and manage IP cameras effortlessly in real-time.
IMPORTANT:
- These release notes cover changes implemented since the latest major release (6.1.1.42471).
BREAKING CHANGES:
- Support for MacOS 12 will be discontinued in the next major release (6.2).
- Security hardening: Access-Control-Allow-Credentials is now false. Browser integrations using cookie-based authentication on cross-origin requests (including fetch with credentials: 'include', XHR.withCredentials = true and Axios requests with withCredentials: true) will stop working and must migrate to Authorization: Bearer <token>.
NEW DEVICES / OPERATING SYSTEMS SUPPORT:
- Raspberry Pi OS 13 (Trixie)
SECURITY UPDATES:
- Security hardening: Access-Control-Allow-Credentials is now false. Browser integrations using cookie-based authentication on cross-origin requests (including fetch with credentials: 'include', XHR.withCredentials = true and Axios requests with withCredentials: true) will stop working and must migrate to Authorization: Bearer <token>.
- Server now sends HSTS headers during the HTTP → HTTPS redirections. As a result, the initial connection is no longer vulnerable to SSL stripping and MITM attacks.
GENERAL IMPROVEMENTS:
- Server Monitoring graph colors improved.
- VCA edge build size is optimized - debug symbols are removed.
- Localization has been improved.
Timeline date format id consistent with OS date format.
- It is now possible to download full health report at the “Advanced > Logs Management” page.
ENTERPRISE FUNCTIONALITY IMPROVEMENTS / FIXES:
- Fixed the issue with reporting Live Streaming service usage.
ANALYTICS IMPROVEMENTS / FIXES:
- Added Intrusion Detection events support on Milesight cameras.
- Metadata parsing (object attributes) is added for the Vivotek analytics plugin.
- After upgrading to 6.1, if trying to choose a Vehicle type in the Milesight plugin search box, it searched for bikes. Fixed.
- On Hikvision cameras, wrong previews of analytic objects (Vehicle or LPR) were shown on the right panel in the Desktop Client. Fixed.
- The Vivotek analytics plugin could initiate a large number of false-positive error notifications. Fixed.
- The analytic event/object from the Vivotek SD9384-EHL could stop appearing in the Desktop Client after some time. Fixed.
- Dahua analytics plugin did not load for autodiscovered devices (i.e. DH-SD22204UE-GN). Fixed.
- The built-in Milesight analytics could shows unexpected "Unknown" objects. Fixed.
- The analytics database could completely fill the storage after upgrading to v6.1. Fixed. …
| Publisher | Network Optix |
|---|---|
| Author | Network Optix, Inc. |
| Version | 6.1.2.42921 |
| Release date | 2026-05-20 |
| License | Proprietary |
| Installer type | burn |
| Architecture | x64 |
| Package ID | NetworkOptix.NxWitness.Server |
winget install --id=NetworkOptix.NxWitness.Server -ewinget upgrade --id=NetworkOptix.NxWitness.Server -ewinget uninstall --id=NetworkOptix.NxWitness.Server -e"nxwitness-server-6.1.2.42921-windows_x64.exe" /quiet /norestartNx Witness Server is proprietary software from Network Optix. Check the publisher's license terms for pricing and usage rights.
The latest version is 6.1.2.42921, released on May 20, 2026.
The download button links to the official installer published on updates.networkoptix.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 6b41f15632d9203b608f31fa5a782ce8b9e7c96275cfea63f3155aa4ebc08120.
Nx Witness Server runs on Windows and is available for 64-bit (x64) systems.
Run the offline installer with "nxwitness-server-6.1.2.42921-windows_x64.exe" /quiet /norestart, or install it with Windows Package Manager: winget install --id=NetworkOptix.NxWitness.Server -e --silent.
Open Settings › Apps › Installed apps, find Nx Witness Server and select Uninstall. From the command line, run winget uninstall --id=NetworkOptix.NxWitness.Server -e.