NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities mentioned below:

What Customers Should Do

CVE 2026-3055 was identified internally through our ongoing security reviews and broader efforts to strengthen the security of the product. 

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 14.1-66.59 and later releases
• NetScaler ADC and NetScaler Gateway 13.1-62.23 and later releases of 13.1
• NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1.37.262 and later releases of 13.1-FIPS and 13.1-NDcPP

Note: Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities. 

CVE-2026-3055 : 

Customers can determine if they have an appliance configured as a SAML IDP Profile by inspecting their NetScaler Configuration for the specified string:

• add authentication samlIdPProfile .*

CVE-2026-4368

Customers can determine if they have an appliance configured as one of the following by inspecting their NetScaler Configuration for the specified strings

• An Auth Server (AAA Vserver):
  
  • add authentication vserver .*
• A Gateway (VPN Vserver,  ICA Proxy, CVPN, RDP Proxy) :
  • add vpn vserver .*

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Severity - Critical

Description of Problem

Vulnerabilities have 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: 

CVE-2026-3055:

• NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-66.59
• NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-62.23
• NetScaler ADC FIPS and NDcPP BEFORE 13.1-37.262

CVE-2026-4368:

• NetScaler ADC and NetScaler Gateway  14.1-66.54

Note: This bulletin only applies to customer-managed NetScaler ADC and NetScaler Gateway. Cloud Software Group upgrades Citrix-managed cloud services and Citrix-managed Adaptive Authentication with the necessary software updates.

What Citrix is Doing

Citrix is notifying customers and channel partners about this potential security issue through the publication of this security bulletin on the Citrix Knowledge Center at https://support.citrix.com/support-home/topic-article-list?trendingCategory=20&trendingTopicName=Security%20Bulletin  

Obtaining Support on This Issue

If you require technical assistance with this issue, please contact Citrix Technical Support. Contact details for Citrix Technical Support are available at https://support.citrix.com/support-home/home 

Subscribe to Receive Alerts

Citrix strongly recommends that all customers subscribe to receive alerts when a Citrix security bulletin is created or modified at https://support.citrix.com/wolken-support/view/aboutsupport/my-support-alerts  

Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. For details on our vulnerability response process and guidance on how to report security-related issues to Citrix, please see the following webpage: https://www.cloud.com/trust-center/support 

Changelog