CVE-2025-5777High· 7.5▾ Abyssal⚠ Exploited in the wildPoC availableInsufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 41.3 · likelihood 20 · exploitation 25 · ransomware 5
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 3 sources. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Federal remediation due Jul 11, 2025
Last analysed / modified upstream
100%
100% → 100%
Exploit-DB · 26 GitHub repos · Nuclei ×1 (last check)
Added to the CISA catalog on Jul 10, 2025. Federal remediation due Jul 11, 2025. View catalog ↗
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
netscaler_application_delivery_controller >= 12.1, < 12.1-55.328netscaler_application_delivery_controller >= 13.1, < 13.1-37.235netscaler_application_delivery_controller >= 13.1, < 13.1-58.32netscaler_application_delivery_controller >= 14.1, < 14.1-43.56netscaler_gateway >= 13.1, < 13.1-58.32netscaler_gateway >= 14.1, < 14.1-43.56Upgrade past the affected range:
netscaler_application_delivery_controller 14.1-43.56netscaler_gateway 14.1-43.56Connected by shared product, vendor, weakness, or advisory.
CVE-2026-19490Critical· 9.8Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.
CVE-2023-3519Critical· 9.8Unauthenticated remote code execution
CVE-2023-4966Critical· 9.4Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.
CVE-2019-19781Critical· 9.8An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0
CVE-2021-4034High· 7.8A local privilege escalation vulnerability was found on polkit's pkexec utility
CVE-2019-11634Critical· 9.8Citrix Workspace App before 1904 for Windows has Incorrect Access Control.