NetScaler ADC and Gateway
CVE-2025-7775: Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is 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
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| ADC 14.1 | 47.48 or later |
| ADC 13.1 | 59.22 or later |
| ADC 13.1 FIPS and NDcPP | 37.241 or later |
| ADC 12.1 FIPS and NDcPP | 55.330 or later |
| Gateway 14.1 | 47.48 or later |
| Gateway 13.1 | 59.22 or later |
| Gateway 13.1 FIPS and NDcPP | 37.241 or later |
| Gateway 12.1 FIPS and NDcPP | 55.330 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is 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
Exploitation
CISA lists this CVE as exploited in the wild since 26 Aug 2025.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.