Ce mail provient de l'extérieur, restons vigilants ===================================================================== CERT-Renater Note d'Information No. 2026/VULN1004 _____________________________________________________________________ DATE : 09/10/2026 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Citrix NetScaler ADC and Citrix NetScaler Gateway versions prior to 14.1-73.46, 14.1-73.46, Citrix NetScaler ADC versions prior to 14.1-FIPS 14.1-73.46 FIPS, 13.1-NDcPP 13.1.37.283. ==================================================================== https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697191&articleURL=Citrix_NetScaler_ADC_and_Citrix_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_107406 _____________________________________________________________________ Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE-2026-107406 Article Id : CTX697191 Last Modified Date : 10-09-2026 11:18 Created Date : 10-08-2026 20:28 Article Record Type : Security Bulletin Severity : Critical Summary Severity - Critical Description of Problem A vulnerability has been discovered in Citrix NetScaler ADC (formerly Citrix ADC) and Citrix NetScaler Gateway (formerly Citrix Gateway). Refer below for further details. Affected Versions: The following supported versions of Citrix NetScaler ADC and Citrix NetScaler Gateway are affected by the vulnerability if they meet the following conditions: NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements: For the following versions: Applicable only when configured as a SAML IdP: NetScaler ADC and NetScaler Gateway between 14.1-73.37 and 14.1-73.41, inclusive NetScaler ADC 14.1-FIPS between 14.1-73.37 FIPS and 14.1-73.41 FIPS, inclusive NetScaler ADC and NetScaler Gateway between 13.1-64.23 and 13.1-64.28, inclusive NetScaler ADC 13.1-FIPS between 13.1-NDcPP 13.1-37.279 and 13.1- 37.282, inclusive For the following versions: Applicable only when configured as a SAML SP or SAML IdP: NetScaler ADC and NetScaler Gateway before 14.1-73.37 NetScaler ADC 14.1-FIPS before 14.1-73.37 FIPS NetScaler ADC and NetScaler Gateway before 13.1-64.23 NetScaler ADC 13.1-FIPS before 13.1-NDcPP 13.1-37.279 Additional Note: Secure Private Access Hybrid deployments using NetScaler instances are also affected by the vulnerability. Customers need to upgrade these NetScaler instances to the recommended NetScaler versions to address the vulnerability. This bulletin only applies to customer-managed Citrix NetScaler ADC (“NetScaler ADC”) and Citrix NetScaler Gateway (“NetScaler Gateway”). Cloud Software Group upgrades the Citrix-managed cloud services and Citrix-managed Adaptive Authentication with the necessary software updates. Details Citrix NetScaler ADC and Citrix NetScaler Gateway are affected by the vulnerability identified below CVE-ID Description Pre-conditions CWE CVSSv4 CVE-2026-107406 Memory overflow vulnerability leading to Remote Code Execution or Denial of Service NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements: For the following versions: Applicable only when configured as a SAML IdP: NetScaler ADC and NetScaler Gateway between 14.1-73.37 and 14.1-73.41, inclusive NetScaler ADC 14.1-FIPS between 14.1-73.37 FIPS and 14.1-73.41 FIPS, inclusive NetScaler ADC and NetScaler Gateway between 13.1-64.23 and 13.1-64.28, inclusive NetScaler ADC 13.1-FIPS between 13.1-NDcPP 13.1-37.279 and 13.1- 37.282, inclusive For the following versions: Applicable only when configured as a SAML SP or SAML IdP: NetScaler ADC and NetScaler Gateway before 14.1-73.37 NetScaler ADC 14.1-FIPS before 14.1-73.37 FIPS NetScaler ADC and NetScaler Gateway before 13.1-64.23 NetScaler ADC 13.1-FIPS before13.1-NDcPP 13.1-37.279 CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer CVSS v4.0 Base Score: 9.5 (CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L) What Customers Should Do Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the following updated versions as soon as possible: Citrix NetScaler ADC and Citrix NetScaler Gateway 14.1-73.46 and later releases Citrix NetScaler ADC and Citrix NetScaler Gateway 13.1-64.29 and later releases of 13.1 Citrix NetScaler ADC 14.1-FIPS 14.1-73.46 FIPS and later releases of 14.1-FIPS Citrix NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1.37.283 and later releases of 13.1-FIPS and 13.1-NDcPP Steps to determine if an appliance meets the CVE preconditions Instructions: Customers can determine whether their NetScaler deployment is configured as a SAML identity provider (IdP) or service provider (SP) by checking its configuration for entries matching either of the following: Appliance is configured as a SAML SP add authentication samlAction Appliance is configured as a SAML IdP add authentication samlIdPProfile (Note: For version-specific requirements, see the “Affected Versions” section above.) Acknowledgement Cloud Software Group acknowledges Joshua Foote, Michael Tucker, and Eugene Lim from the XOR Team at JPMorgan Chase for working with us to protect our customers. Additional information / Reference Blog Cloud Software Group team has published a related blog at: https://community.citrix.com/techzone-blogs/110_security-updates/protecting-customers-immediate-guidance-for-cve-2026-107406-in-netscaler-adc-and-netscaler-gateway-r1631/ which contains further context. 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 2026-10-08 Initial Publication 2026-10-08 Added a link to the NetScaler blog that contains further context ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================