Nx Witness Client 6.1.2.42921

Intelligent Video Management System

  • By Network Optix
  • Proprietary
  • Updated May 20, 2026
Download for Windows

About Nx Witness Client

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.

What's new in 6.1.2.42921

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. …

Full release notes »

Technical details

PublisherNetwork Optix
AuthorNetwork Optix, Inc.
Version6.1.2.42921
Release date2026-05-20
LicenseProprietary
Installer typeburn
Architecturex64
Package IDNetworkOptix.NxWitness.Client

Install Nx Witness Client from the command line

Install with Windows Package Manager
winget install --id=NetworkOptix.NxWitness.Client -e
Update to the latest version
winget upgrade --id=NetworkOptix.NxWitness.Client -e
Uninstall
winget uninstall --id=NetworkOptix.NxWitness.Client -e
Silent install with the offline installer
"nxwitness-client-6.1.2.42921-windows_x64.exe" /quiet /norestart

camerasurveillance

Nx Witness Client version history

  • 6.1.1.42624
  • 6.1.0.42176
  • 6.0.6.41837
  • 6.0.5.41290

Frequently asked questions

Is Nx Witness Client free?

Nx Witness Client is proprietary software from Network Optix. Check the publisher's license terms for pricing and usage rights.

What is the latest version of Nx Witness Client?

The latest version is 6.1.2.42921, released on May 20, 2026.

Is it safe to download Nx Witness Client?

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 cd3e007902bcc034389de8feae33b38f85460275ec36c1896adf40ab4b79c675.

Which Windows versions does Nx Witness Client support?

Nx Witness Client runs on Windows and is available for 64-bit (x64) systems.

How do I install Nx Witness Client silently?

Run the offline installer with "nxwitness-client-6.1.2.42921-windows_x64.exe" /quiet /norestart, or install it with Windows Package Manager: winget install --id=NetworkOptix.NxWitness.Client -e --silent.

How do I uninstall Nx Witness Client?

Open Settings › Apps › Installed apps, find Nx Witness Client and select Uninstall. From the command line, run winget uninstall --id=NetworkOptix.NxWitness.Client -e.