Live › vulnerability › CVE-2023-6549
Go to dashboardCitrix NetScaler ADC and NetScaler Gateway contain a buffer overflow that lets an attacker crash the appliance, causing denial of service. 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 or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Citrix NetScaler ADC and NetScaler Gateway | vendor | – | – |
| citrix netscaler application delivery controller | vendor | >= 12.1, < 12.1-55.302 | 12.1-55.302 |
| citrix netscaler application delivery controller | vendor | >= 13.0, < 13.0-92.21 | 13.0-92.21 |
| citrix netscaler application delivery controller | vendor | >= 13.1, < 13.1-37.176 | 13.1-37.176 |
| citrix netscaler application delivery controller | vendor | >= 13.1, < 13.1-51.15 | 13.1-51.15 |
| citrix netscaler application delivery controller | vendor | >= 14.1, < 14.1-12.35 | 14.1-12.35 |
| citrix netscaler gateway | vendor | >= 13.0, < 13.0-92.21 | 13.0-92.21 |
| citrix netscaler gateway | vendor | >= 13.1, < 13.1-51.15 | 13.1-51.15 |
| citrix netscaler gateway | vendor | >= 14.1, < 14.1-12.35 | 14.1-12.35 |
Unknown from the sources.
Apply the mitigation or fixed build from Citrix's advisory for CVE-2023-6549; if none is available, discontinue use of the product as CISA directs.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for a denial-of-service when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
This page as .md · .json · in your agent: get_signal("CVE-2023-6549")
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