NetScaler ADC and NetScaler Gateway contain the vulnerability mentioned below:

What Customers Should Do

Exploits of CVE-2025-7775 on unmitigated appliances have been observed.

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 14.1-47.48 and later releases
• NetScaler ADC and NetScaler Gateway 13.1-59.22 and later releases of 13.1
• NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.241 and later releases of 13.1-FIPS and 13.1-NDcPP
• NetScaler ADC 12.1-FIPS and 12.1-NDcPP 12.1-55.330 and later releases of 12.1-FIPS and 12.1-NDcPP

Note: 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. 

CVE-2025-7775:

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 .*

• LB vserver of Type HTTP_QUIC|SSL|HTTP bound with IPv6 services or servicegroups bound with IPv6 servers:

enable ns feature lb.*

add serviceGroup .* (HTTP_QUIC|SSL|HTTP) .*

add server .* <IPv6>

bind servicegroup <servicegroup name> <IPv6 server> .*

add lb vserver .* (HTTP_QUIC|SSL|HTTP) .*

bind lb vserver .* <ipv6 servicegroup name>

• LB vserver of Type HTTP_QUIC|SSL|HTTP bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers: 

enable ns feature lb.*

add serviceGroup .* (HTTP_QUIC | SSL | HTTP) .*

add server .* <domain> -queryType AAAA

add service .* <IPv6 DBS server >  

bind servicegroup <servicegroup name> <IPv6 DBS server> .*

add lb vserver .* (HTTP_QUIC | SSL | HTTP) .*

bind lb vserver .* <ipv6 servicegroup name>

• CR vserver with type HDX: 

  add cr vserver .* HDX .*

CVE-2025-7776:

Customers can determine if they have an appliance configured by inspecting their ns.conf file for the specified strings

• A Gateway (VPN vserver) with with PCoIP Profile bounded to it

add vpn vserver .* -pcoipVserverProfileName .*

Workarounds/ Mitigating Factors

None

Acknowledgement

Cloud Software Group thanks Jimi Sebree of Horizon3.ai, Jonathan Hetzer, of Schramm & Partnerfor and François Hämmerli for working with us to protect Citrix customers.

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/knowledge-center#/

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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

Severity - Critical

Description of Problem

Multiple 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: 

• NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-47.48
• NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-59.22
• NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.241-FIPS and NDcPP
• NetScaler ADC 12.1-FIPS and NDcPP BEFORE 12.1-55.330-FIPS and NDcPP

Additional 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. 

This 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.