{"uuid": "6001a8cc-e4a0-48af-9eaf-7967fc09c50e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "name": "NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2025-7775, CVE-2025-7776 and CVE-2025-8424", "description": "NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2025-7775, CVE-2025-7776 and CVE-2025-8424\nArticle Id : CTX694938\nLast Modified Date : 08-26-2025 12:11\nCreated Date : 08-26-2025 11:40\nArticle Record Type : Security Bulletin\nSummary\nSeverity - Critical\nDescription of Problem\n\nMultiple vulnerabilities have been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.\nAffected Versions\n\nThe following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: \n\n    NetScaler ADC and NetScaler Gateway\u202f14.1\u202fBEFORE 14.1-47.48\n    NetScaler ADC and NetScaler Gateway\u202f13.1\u202fBEFORE 13.1-59.22\n    NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.241-FIPS and NDcPP\n    NetScaler ADC 12.1-FIPS and NDcPP BEFORE 12.1-55.330-FIPS and NDcPP\n\n\nAdditional 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. \n\nThis 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.\nDetails\n\nNetScaler ADC and NetScaler Gateway contain the vulnerability mentioned below:\n\nCVE-ID \n\tDescription  \tPre-conditions \tCWE \tCVSSv4\n\nCVE-2025-7775\n\t\n\nMemory overflow vulnerability leading to Remote Code Execution and/or Denial of Service\n\t\n\nNetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server\n\n(OR)\n\nNetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers \n\n(OR)\n\nNetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers\n\n(OR)\n\nCR virtual server with type HDX\n\t\n\nCWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer\n\t\n\nCVSS v4.0 Base Score: 9.2\n\n(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)\n\nCVE-2025-7776\n\t\n\nMemory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service\n\t\n\nNetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) with PCoIP Profile bounded to it \n\t\n\nCWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer\n\t\n\nCVSS v4.0 Base Score: 8.8\n\n(CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L)\n\nCVE-2025-8424\n\t\n\nImproper access control on the NetScaler Management Interface\n\t\n\nAccess to NSIP, Cluster Management IP or local GSLB Site IP or SNIP with Management Access\n\t\n\nCWE-284: Improper Access Control\n\t\n\nCVSS v4.0 Base Score: 8.7\n\n(CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)\nWhat Customers Should Do\n\nExploits of CVE-2025-7775 on unmitigated appliances have been observed.\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 14.1-47.48 and later releases\n    NetScaler ADC\u202fand NetScaler Gateway 13.1-59.22 and later releases of 13.1\n    NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.241 and later releases of 13.1-FIPS and 13.1-NDcPP\n    NetScaler ADC 12.1-FIPS and 12.1-NDcPP 12.1-55.330 and later releases of 12.1-FIPS and 12.1-NDcPP\n\nNote: 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. \n\n \n\nCVE-2025-7775:\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\n    add authentication vserver .*\n\n    A Gateway (VPN Vserver,  ICA Proxy, CVPN, RDP Proxy) \n\n    add vpn vserver .*\n\n    LB vserver of Type HTTP_QUIC|SSL|HTTP bound with IPv6 services or servicegroups bound with IPv6 servers:\n\n    enable ns feature lb.*\n\n    add serviceGroup .* (HTTP_QUIC|SSL|HTTP) .*\n\n    add server .* <IPv6>\n\n    bind servicegroup <servicegroup name> <IPv6 server> .*\n\n    add lb vserver .* (HTTP_QUIC|SSL|HTTP) .*\n\n    bind lb vserver .* <ipv6 servicegroup name>\n\n    LB vserver of Type HTTP_QUIC|SSL|HTTP bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers: \n\n    enable ns feature lb.*\n\n    add serviceGroup .* (HTTP_QUIC | SSL | HTTP) .*\n\n    add server .* <domain> -queryType AAAA\n\n    add service .* <IPv6 DBS server >  \n\n    bind servicegroup <servicegroup name> <IPv6 DBS server> .*\n\n    add lb vserver .* (HTTP_QUIC | SSL | HTTP) .*\n\n    bind lb vserver .* <ipv6 servicegroup name>\n\n    CR vserver with type HDX: \n\n    add cr vserver .* HDX .*\n\n \n\nCVE-2025-7776:\n\nCustomers can determine if they have an appliance configured by inspecting their ns.conf file for the specified strings\n\n    A Gateway (VPN vserver) with with PCoIP Profile bounded to it\n\n    add vpn vserver .* -pcoipVserverProfileName .*\n\n \nWorkarounds/ Mitigating Factors\n\nNone\n\n \nAcknowledgement\n\nCloud Software Group thanks Jimi Sebree of Horizon3.ai, Jonathan Hetzer, of Schramm & Partnerfor and Fran\u00e7ois H\u00e4mmerli for working with us to protect Citrix customers.\n\n Reference: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938\n", "creation_timestamp": "2025-08-27T06:53:13.866271+00:00", "timestamp": "2025-08-27T06:53:13.866271+00:00", "related_vulnerabilities": ["CVE-2025-8424", "CVE-2025-7775", "CVE-2025-7776"], "author": {"login": "adulau", "name": "Alexandre Dulaunoy", "uuid": "c933734a-9be8-4142-889e-26e95c752803"}}