NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2025-7775, CVE-2025-7776 and CVE-2025-8424
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.
Details
NetScaler ADC and NetScaler Gateway contain the vulnerability mentioned below:
| CVD-ID | Description | Pre-conditions | CWE | CVSSv4 |
| CVE-2025-7775 | Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service |
NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
(OR) NetScaler 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 (OR) NetScaler 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 (OR) CR virtual server with type HDX |
CWE-119 – Improper Restriction of Operations within the Bounds of a Memory Buffer | CVSS v4.0 Base Score: 9.2 (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) |
| CVE-2025-7776 | Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service | NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) with PCoIP Profile bounded to it | CWE-119 – Improper Restriction of Operations within the Bounds of a Memory Buffer | CVSS v4.0 Base Score: 8.8 (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) |
| CVE-2025-8424 | Improper access control on the NetScaler Management Interface | Access to NSIP, Cluster Management IP or local GSLB Site IP or SNIP with Management Access | CWE-284: Improper Access Control | CVSS v4.0 Base Score: 8.7 (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) |
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.
Monitor the Article Below for More Information
https://support.citrix.com/wolken-support/kbsearch/article?articleNumber=CTX694938
For assistance from the Kraft Kennedy team, please contact us.