{"uuid": "1ae9c3df-c65f-4755-b3a9-4d76f8c0e772", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "name": "NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-3055 and CVE-2026-4368", "description": "# NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-3055 and CVE-2026-4368\n    \n### NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-3055 and CVE-2026-4368\n\n#### Article ID: CTX696300\n\n#### Description\n\nNetScaler ADC and NetScaler Gateway are affected by the vulnerabilities mentioned below:\n\n\n\n* CVE-ID: CVE-2026-3055\n  * Description: Insufficient input validation leading to memory overread\n  * Pre-conditions: Citrix ADC or Citrix Gateway must be configured as a SAML IDP\n  * CWE: CWE-125: Out-of-bounds Read\n  * CVSS v4.0: CVSS v4.0 Base Score: 9.3(CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)\n* CVE-ID: CVE-2026-4368\n  * Description: Race Condition leading to User Session Mixup\n  * Pre-conditions: Appliance must be configured as:Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0OR\u00a0AAA virtual server\n  * CWE: CWE-362: Race Condition\n  * CVSS v4.0: CVSS v4.0 Base Score: 7.7(CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)\n\n\nWhat Customers Should Do\n------------------------\n\nCVE 2026-3055 was identified internally through our ongoing security reviews and broader efforts to strengthen the security of the product.\u00a0\n\nCloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible.\n\n*   NetScaler ADC\u202fand NetScaler Gateway 14.1-66.59 and later releases\n*   NetScaler ADC\u202fand NetScaler Gateway 13.1-62.23 and later releases of 13.1\n*   NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1.37.262 and later releases of 13.1-FIPS and 13.1-NDcPP\n\n**Note**: Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.\u00a0\n\n**CVE-2026-3055 :**\u00a0\n\nCustomers can determine if they have an appliance configured as a SAML IDP Profile by inspecting their NetScaler Configuration for the specified string:\n\n*   add authentication samlIdPProfile .\\*\n\n**CVE-2026-4368**\n\nCustomers can determine if they have an appliance configured as one of the following by inspecting their NetScaler Configuration for the specified strings\n\n*   An Auth Server (AAA Vserver):  \n    *   add authentication vserver .\\*\n*   A Gateway (VPN Vserver,\u00a0 ICA Proxy, CVPN, RDP Proxy) :\n    *   add vpn vserver .\\*\n\n#### Environment\n\nThe 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 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.\n\n#### Issue/Introduction\n\nSeverity - Critical\n\nDescription of Problem\n----------------------\n\nVulnerabilities have been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.\n\nAffected Versions:\n------------------\n\nThe following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities:\u00a0\n\n**CVE-2026-3055:**\n\n*   NetScaler ADC and NetScaler Gateway\u202f14.1\u202fBEFORE 14.1-66.59\n*   NetScaler ADC and NetScaler Gateway\u202f13.1\u202fBEFORE 13.1-62.23\n*   NetScaler ADC FIPS and NDcPP BEFORE 13.1-37.262\n\n  \n**CVE-2026-4368:**\n\n*   NetScaler ADC and NetScaler Gateway\u202f 14.1-66.54\n\n  \n**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.\n\n#### Additional Information\n\nWhat Citrix is Doing\n--------------------\n\nCitrix 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](https://support.citrix.com/support-home/topic-article-list?trendingCategory=20&trendingTopicName=Security%20Bulletin)\u00a0\u00a0\n\nObtaining Support on This Issue\n-------------------------------\n\nIf 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](https://support.citrix.com/support-home/home)\u00a0\n\nSubscribe to Receive Alerts\n---------------------------\n\nCitrix 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](https://support.citrix.com/wolken-support/view/aboutsupport/my-support-alerts)\u00a0\u00a0\n\nReporting Security Vulnerabilities to Citrix\n--------------------------------------------\n\nCitrix 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](https://www.cloud.com/trust-center/support)", "creation_timestamp": "2026-03-23T15:53:28.892761+00:00", "timestamp": "2026-03-23T16:09:23.280425+00:00", "related_vulnerabilities": ["CVE-2026-4368", "CVE-2026-3055"], "meta": [{"ref": ["https://support.citrix.com/external/article/CTX696300/netscaler-adc-and-netscaler-gateway-secu.html"]}], "author": {"login": "adulau", "name": "Alexandre Dulaunoy", "uuid": "c933734a-9be8-4142-889e-26e95c752803"}}