Citrix Workspace App for Windows Security Bulletin CVE-2026-84419 and CVE-2026-84420
Es gibt 2 Sicherheitslücken in der Citrix WorkspaceApp. Es wird empfohlen die Konditionen zu prüfen und die WorkspaceApp bei zukünftigen Client Updates zu aktualisieren.
Description of Problem
Vulnerabilities have been discovered in the Citrix Workspace app for Windows. Refer to the information below for further details.
Affected Versions:
CVE-2026-84419 – The following supported versions of the Citrix Workspace app for Windows are impacted by CVE-2026-84419:
Current Release (CR)
- Citrix Workspace app for Windows versions BEFORE 2603.20
Long Term Service Release (LTSR)
- Citrix Workspace app for Windows versions BEFORE LTSR 2607 Hotfix 1
- Citrix Workspace app for Windows versions BEFORE LTSR 2507 CU3 Hotfix 1
CVE-2026-84420 – The following supported versions of the Citrix Workspace app for Windows are impacted by CVE-2026-84420:
Current Release (CR)
- Citrix Workspace app for Windows versions BEFORE 2603.20
Long Term Service Release (LTSR)
- Citrix Workspace app for Windows versions BEFORE LTSR 2607
- Citrix Workspace app for Windows versions BEFORE LTSR 2507 CU3
Disclaimer
The information on this page is being provided to you on an «AS IS» and «AS-AVAILABLE» basis. The issues described on this page may or may not impact your system(s). Cloud Software Group Holdings, Inc. and its affiliates, including Citrix Systems, Inc. (collectively, «Cloud SG») make no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. BY ACCESSING THIS PAGE, YOU ACKNOWLEDGE THAT CLOUD SG SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. Cloud SG reserves the right to change or update the information on this page at any time. Cloud SG accordingly recommends that you always view the latest version of this page. The information contained herein is being provided to you under the terms of your applicable customer agreement with Cloud SG, and may be used only for the purposes contemplated by such agreement. If you do not have such an agreement with Cloud SG, this information is provided under the cloud.com Terms of Use, and may be used only for the purposes contemplated by such Terms of Use.
Details
Citrix Workspace app for Windows is affected by the vulnerability described below
| CVE-ID | Description | Pre-conditions | CWE | CVSSv4 |
| CVE-2026-84419 | Out-of-Bounds Write | Local access to the target system AND App Protection feature enabled | CWE-787: Out-of-bounds Write | CVSS v4.0 Base Score: 6.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CVE-2026-84420 | Out-of-Bounds Write and Out-of-Bounds Read | Local access to the target system | CWE-787: Out-of-bounds Write CWE-125: Out-of-bounds Read | CVSS v4.0 Base Score: 5.8CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N |
What Customers Should Do
Citrix strongly recommends that customers upgrade their Citrix Workspace app for Windows to versions that contain the fixes as soon as possible.
CVE-2026-84419 – Citrix Workspace app for Windows versions that contain the fixes for CVE-2026-84419 are:
Current Release (CR)
- Citrix Workspace app for Windows 2603.20 and later versions
Long Term Service Release (LTSR)
- Citrix Workspace app for Windows LTSR 2607 Hotfix 1 and later versions
- Citrix Workspace app for Windows LTSR 2507 CU3 Hotfix 1 and later versions
CVE-2026-84420 – Citrix Workspace app for Windows versions that contain the fixes for CVE-2026-84420 are:
Current Release (CR)
- Citrix Workspace app for Windows 2603.20 and later versions
Long Term Service Release (LTSR)
- Citrix Workspace app for Windows LTSR 2607 and later versions
- Citrix Workspace app for Windows LTSR 2507 CU3 and later versions
Acknowledgement
Cloud Software Group thanks Julian Horoszkiewicz of Atos Threat Research Center for working with us to protect Cloud Software Group and its customers.