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NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities mentioned below: CVE-ID Description Pre-conditions CWE CVSS v4.0 CVE-2026-3055 Insufficient input validation leading to memory overread Citrix ADC or Citrix Gateway must be configured as a SAML IDP CWE-125: Out-of-bounds Read 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) CVE-2026-4368 Race Condition leading to User Session Mixup Appliance must be configured as: Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server CWE-362: Race Condition 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) 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 14.1-60.58 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 .*

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

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)

Appliance must be configured as:

Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy)

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)

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.

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

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

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

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Vulnerabilities have been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.

The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities:

Note : CVE-2026-4368 only impacts build version 14.1-66.54.

Additional 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.

Citrix is notifying customers and channel partners this potential security issue through the publication of this security bulletin on the Citrix Knowledge Center at

If you require technical assistance with this issue, please Citrix Technical Support. details for Citrix Technical Support are available at

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:

Updated 14.1 Affected Version for CVE-2026-3055.

Included 14.1-60.58 as a version that remediates CVE-2026-3055 and CVE-2026-4368