Live › vulnerability › CVE-2025-6543
Go to dashboardA buffer overflow in Citrix NetScaler ADC and Gateway can be triggered to redirect control flow or crash the appliance. CISA lists it as actively exploited in the wild.
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 | >= 13.1, < 13.1-37.236 | 13.1-37.236 |
| citrix netscaler application delivery controller | vendor | >= 13.1, < 13.1-59.19 | 13.1-59.19 |
| citrix netscaler application delivery controller | vendor | >= 14.1, < 14.1-47.46 | 14.1-47.46 |
| citrix netscaler gateway | vendor | >= 13.1, < 13.1-59.19 |
| 13.1-59.19 |
| citrix netscaler gateway | vendor | >= 14.1, < 14.1-47.46 | 14.1-47.46 |
Check whether 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.
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 a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as 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-2025-6543")
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