NETSCALER ADC AND GATEWAY 14.1 · CVE-2026-120864 · Infrastructure
FIX → 14.1-73.57 · 13.1-64.39 · 14.1-73.58 FIPS · 13.1-37.293 ✓ verified
A memory overflow in the ICA proxy of Citrix NetScaler ADC and NetScaler Gateway can cause unpredictable behavior or a denial of service. The sources do not state whether code execution or data access is possible.
first public Nov 13, 2026 · 2 sources
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NetScaler ADC and NetScaler Gateway appliances you run yourself are affected if they are configured as a Gateway vpn virtual server, an AAA virtual server, or a CR virtual server of type HDX, and run a build older than the fixed ones. Citrix rates it CVSS v4 9.3 with network access, no privileges and no user interaction, and describes the effect as unpredictable behavior or denial of service. Appliances without those virtual servers do not meet the precondition. Citrix does not say whether it is exploited, and no public PoC was found.
Not affected if managed-hosting, no-cr-vserver-hdx, no-gateway-or-aaa-vserver, unknown
Who cares citrix, hdx, ica-proxy, netscaler, netscaler-gateway, self-hosted
Memory overflow in ICA proxy can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway.
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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add vpn vserver, add authentication vserver, or add cr vserver <name> HDXshow ns version: exposed if below 14.1-73.57, 13.1-64.39, 14.1-73.58 FIPS or 13.1-37.293 FIPS/NDcPPUpgrade to 14.1-73.57 · 13.1-64.39 · 14.1-73.58 FIPS · 13.1-37.293