« All news

Prosys OPC UA Modbus Server 1.4.4 Released

04.05.2021


We have released a new 1.4.4 version of the Prosys OPC UA Modbus Server. This is a security release. Due to an implementation error, user authorization checks were not performed and all username & password combinations and user certificates were always granted access, if the respective authentication methods were enabled. Affected versions are 1.2.x, 1.3.x and 1.4.x (older than this release).

We recommend everyone to update to this version.

Note that while the error is critical, it does impact you only if user authorization played a role in the way you use the application. The application doesn’t have user specific data and most use cases of OPC UA typically use just Application Level Authentication with the Anonymous user authentication mode.

Read more at the Release Notes »

Request Software Download »

Purchase a License »

Please contact Prosys OPC Sales for more information.

About Prosys OPC Ltd

Prosys OPC is a leading provider of professional OPC software and services with over 20 years of experience in the field. OPC and OPC UA (Unified Architecture) are communications standards used especially by industrial and high-tech companies.

Read more about us »

Newest blog posts

Connecting OPC UA Publisher to Azure with MQTT

Prosys OPC UA SDK for Java allows publishing OPC UA data to Azure using the MQTT protocol.

Introduction to OPC UA Online Course - Instructions

The blog post describes step-by-step TalentLMS sign-up and course payment process

Update to importing Information Models, December 2020

Updates to the blog post on importing Information Models from NodeSet files

View all blog posts »