---
title: Litmus Edge 4.4.1
slug: litmusedge/product-features/2026/lts/litmus-edge-441
description: Security updates and resolved issues in Litmus Edge 4.4.1.
docTags: 
createdAt: 2026-10-22T17:29:02.014Z
---

## Release type: Security and maintenance update

Litmus Edge 4.4.1 includes important security updates, dependency improvements, and reliability fixes. We recommend upgrading to this version to maintain the security and stability of your deployment.

Release Date: October 23, 2026

:::hint{type="info"}
**Note:** For information on updates to APIs, see the [Litmus Edge](https://api.litmus.io/view/2s9Y5R1RvG#f4804d0e-07a6-4bbc-862e-a346cdc53870) and [Litmus Edge Manager](https://api.litmus.io/view/2s9Y5R1RvG#b7e9be00-4246-4091-8e34-bbe527228b46) change logs.
:::

## Security updates

- Updated security-related components and dependencies to address recently disclosed vulnerabilities.
- Improved certificate trust handling through updates to relevant security libraries and components.
- Applied additional security maintenance updates to strengthen the overall security posture of Litmus Edge.

:::hint{type="warning"}
**We strongly recommend that you upgrade to Litmus Edge 4.4.1 or a subsequent security-maintained release.**
:::

## Resolved issues

**DeviceHub:**

- Fixed issue where the AB DF1 Ethernet driver read `0` for Output (`O`), Input (`I`), Timer (`T`), Counter (`C`), and Control (`R`) tags set to the `INT` data type, even when the PLC contained a non-zero value. Writes and `UINT` reads were not affected.
- Fixed issue where the MQTT Client driver could publish incorrect values or out-of-order data when values changed at very short intervals (around 1 ms).

**OPC UA:**

- Fixed issue where OPC UA Server tags with names containing a forward slash (`/`) were missing from the OPC UA hierarchy after an upgrade from 4.0.16 to 4.4.0. These tags are now retained when you upgrade.