CVE-2025-5777 (CVSS 9.3): An insufficient input validation leading to memory overread vulnerability. This vulnerability affects NetScaler products configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.
CVE-2025-5349 (CVSS 8.7): An improper access control vulnerability in the NetScaler Management Interface.
What’s happening
Systems affected
The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities:
- NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-43.56
- NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-58.32
- NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.235-FIPS and NDcPP
- NetScaler ADC 12.1-FIPS BEFORE 12.1-55.328-FIPS
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are end-of-life (EOL) but are also vulnerable.
What this means
Organisations who utilise affected NetScaler ADC and NetScaler Gateway versions could be vulnerable to the listed vulnerability.
What to look for
How to tell if you’re at risk
If you are running a NetScaler ADC and NetScaler Gateway instance within the listed versions.
What to do
Prevention
Update to the latest version of NetScaler ADC and NetScaler Gateway.
More information
Vendor Advisory