Vor eingen Tagen hat Citrix eine MaIl an alle Kunden verschickt, mit der Information, dass ab dem 15. April 2026 das alte Lizenzmodell mit lokalen Lizenzfiles nicht mehr unterstützt wird. Statt dessen soll ab dann zwingend der neue License Activation Service (LAS) genutzt werden.
Kunden werden aufgefordert, baldmöglichst auf das neue LAS Lizenzverfahren umzustellen. Diese Umstellung erfordert ein Update aller Citrix Komponenten auf mindestens CR 2411, oder neuer.
Unglücklicherweise treten bei diversen Produkten nach der Installation Lizenzierungsprobleme auf. Welche Probleme auftreten, hängt von diversen Parametern ab. So spielt das Alter der lokalen Lizenzfiles, aber auch das Lizenzmodell (Universal, HMC, Citrix for Private Cloud, etc.) eine Rolle. Zusammen mit den unterschiedliche Citrix Produkten (CVAD, PVS, Lizenz Server, XenServer, etc.) ergibt sich eine recht grosse Matrix mit unterschiedlichsten Problemen.
Bei diversen Kunden wurden teils gravierende Probleme entdeckt. So funktioniert nach dem Update auf 2507 LTSR, abhängig vom Lizenzmodell, entweder PVS nicht mehr, siehe https://support.citrix.com/external/article/695191/citrix-provisioning-services-reports-the.html, oder alle Mitarbeiter erhalten in ihrer Citrix Session ein Pop-Up mit der Info, dass die Umgebung ungenügend lizenziert ist und in 30 Tagen aufhört zu funktionieren.
AXACOM empfiehlt daher allen Kunden, momentan keine Updates ihrer CVAD-, Lizenz- und PVS-Server durchzuführen und zu warten, bis die Probleme behoben sind.
After upgrading NetScaler to build 14.1 47.46 or 13.1 59.19 customers might experience issues with Authentication.This can manifest as a «broken» login page, especially when using authentication methods like DUO configurations based on Radius authentication, SAML, or any Identity Provider (IDP) that relies on custom scripts.
Note : This behavior can possibly be due to the Content Security Policy (CSP) header being enabled by default in this NetScaler build, especially when CSP was not enabled prior to the upgrade.
Lösung
To resolve this issue temporarily, you need to disable the default CSP header on your NetScaler appliance. After disabling, it’s recommended to flush the cache to ensure the changes take effect immediately.
To ensure that your configurations work with CSP , please reach out to the support team so that we can identify the issue and fix it for your configuration.
Steps to Disable CSP Header:
Using Command Line Interface (CLI): Execute the following commands from Netscaler CLI:
set aaa parameter -defaultCSPHeader DISABLED
save ns config
Using Graphical User Interface (GUI):
Step 1: Log in to the NetScaler GUI.
Step 2: Navigate to NetScaler Gateway > Global Settings.
Step 3: Under the «Authentication Settings» section, click on Change authentication AAA settings.
Step 4: On the «Configure AAA Parameters» page, locate the Default CSP Header field. From the dropdown menu, select DISABLED.
Click OK to save the changes.
Post-Configuration Recommendation:
While enabling or disabling the default CSP policy, you are recommended to run the following command in the CLI
flush cache contentgroup loginstaticobjects
After performing the steps above, attempt to access your NetScaler Gateway authentication portal to validate if the issue is resolved.
Zusatz
Bei Fragen und Problemen können Sie sich gerne an Ihren AXACOM Verantwortlichen wenden.
A vulnerability has been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.
Affected Versions
The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities:
NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-47.46
NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-59.19
NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.236-FIPS and NDcPP
NetScaler ADC 12.1-FIPS is not affected by this vulnerability.
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and are vulnerable. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
Additional Note: Secure Private Access on-prem or Secure Private Access Hybrid deployments using NetScaler instances are also affected by the vulnerabilities. Customers need to upgrade these NetScaler instances to the recommended NetScaler builds to address the vulnerabilities.
This bulletin only applies to customer-managed NetScaler ADC and NetScaler Gateway. Cloud Software Group upgrades the Citrix-managed cloud services and Citrix-managed Adaptive Authentication with the necessary software updates.
Details
NetScaler ADC and NetScaler Gateway contain the vulnerability mentioned below:
CVE-ID
Description
Pre-conditions
CWE
CVSSv4
CVE-2025-6543
Memory overflow vulnerability leading to unintended control flow and Denial of Service
NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CWE-119 – Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS v4.0 Base Score: 9.2(CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)
What Customers Should Do
Exploits of CVE-2025-6543 on unmitigated appliances have been observed.
Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible.
NetScaler ADC and NetScaler Gateway 14.1-47.46 and later releases
NetScaler ADC and NetScaler Gateway 13.1-59.19 and later releases of 13.1
NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.236 and later releases of 13.1-FIPS and 13.1-NDcPP. Customers should contact support – https://support.citrix.com/support-home/home to obtain the 13.1-FIPS and 13.1-NDcPP builds that address this issue.
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and no longer supported. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
A vulnerability has been discovered in the Citrix Secure Access Client for Windows. Refer to below for further details:
Affected Versions
The following supported versions of Citrix Secure Access Client for Windows are affected:
Citrix Secure Access Client for Windows versions BEFORE 25.5.1.15
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, Inc. and its subsidiaries (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. We accordingly recommend 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 Secure Access Client for Windows contains a vulnerability mentioned below
CVE-ID
Description
Pre-conditions
CWE
CVSSv4
CVE-2025-0320
Local Privilege escalation allows a low-privileged user to gain SYSTEM privileges
Standard user access on local system
CWE-269: Improper Privilege Management
CVSS v4.0 Base Score: 8.5 (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
What Customers Should Do
Cloud Software Group strongly urges customers of Citrix Secure Access Client for Windows to install the relevant updated versions as soon as possible:
Citrix Secure Access Client for Windows 25.5.1.15 and later releases
Acknowledgements
Cloud Software Group thanks Damien Foulde of Axians for working with us to protect Cloud Software Group customers.
A vulnerability has been discovered in NetScaler Console (formerly NetScaler ADM) and NetScaler SDX (SVM) . Refer to below for further details:
Affected Versions
The following supported versions of NetScaler Console are affected:
NetScaler Console 14.1 BEFORE 14.1.47.46
NetScaler Console 13.1 BEFORE 13.1.58.32
NetScaler SDX (SVM) 14.1 BEFORE 14.1.47.46
NetScaler SDX (SVM) 13.1 BEFORE 13.1.58.32
This bulletin only applies to the customer-managed NetScaler Console. Customers using Citrix-managed NetScaler Console Service do not need to take any action.
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, Inc. and its subsidiaries (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. We accordingly recommend 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
NetScaler Console contains the vulnerability mentioned below:
CVE ID
Description
Pre-conditions
CWE
CVSSv4
CVE-2025-4365
Arbitrary file read
Authenticated Access to NetScaler Console
CWE-284: Improper Access Control
CVSS v4.0 Base Score: 6.9(CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N )
What Customers Should Do
Cloud Software Group strongly urges customers of NetScaler Console and NetScaler SDX (SVM) to install the relevant updated versions as soon as possible:
NetScaler Console 14.1.47.46 and later releases
NetScaler Console 13.1.58.32 and later releases of 13.1
NetScaler SDX (SVM) 14.1.47.46 and later releases
NetScaler SDX (SVM) 13.1.58.32 and later releases of 13.1
Acknowledgements
Cloud Software Group thanks Calum Hutton of Rapid7 for working with us to protect Cloud Software Group customers
