Live › vulnerability › CVE-2025-5777
Go to dashboardCitrix NetScaler ADC and Gateway contain an out-of-bounds read caused by insufficient input validation, triggered when the appliance runs as a Gateway (VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server. An attacker can read memory beyond the intended buffer, which can leak session tokens and other sensitive data held in the appliance's memory.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Citrix NetScaler ADC and Gateway | vendor | – | – |
| citrix netscaler application delivery controller | vendor | >= 12.1, < 12.1-55.328 | 12.1-55.328 |
| citrix netscaler application delivery controller | vendor | >= 13.1, < 13.1-37.235 | 13.1-37.235 |
| citrix netscaler application delivery controller | vendor | >= 13.1, < 13.1-58.32 | 13.1-58.32 |
| citrix netscaler application delivery controller | vendor |
| >= 14.1, < 14.1-43.56 |
| 14.1-43.56 |
| citrix netscaler gateway | vendor | >= 13.1, < 13.1-58.32 | 13.1-58.32 |
| citrix netscaler gateway | vendor | >= 14.1, < 14.1-43.56 | 14.1-43.56 |
Check whether the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server; the sources do not give a command.
Apply the vendor mitigations or patched build from Citrix; the sources do not name the fixed version.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
This page as .md · .json · in your agent: get_signal("CVE-2025-5777")
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