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NetScaler ADC and NetScaler Gateway Memory Overflow (CTX697191 / CVE-2026-107406)

critical Nessus Plugin ID 366457

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Synopsis

The remote device is affected by a memory overflow vulnerability.

Description

The remote NetScaler ADC (formerly Citrix ADC) or NetScaler Gateway (formerly Citrix Gateway) device is 13.1 prior to 13.1-64.29, or 14.1 prior or equal to 14.1-73.41, or 13.1-FIPS/NDcPP prior to 13.1-37.283, or 14.1-FIPS prior or equal to 14.1-73.41 FIPS. It is, therefore, affected by a vulnerability:

 - Memory overflow vulnerability in NetScaler ADC and NetScaler Gateway leading to Remote Code Execution or Denial of Service. The appliance must be configured as a SAML SP or SAML IdP to be affected. Versions 13.1-64.23 through 13.1-64.28, 14.1-73.37 through 14.1-73.41, 13.1-NDcPP 13.1-37.279 through 13.1-37.282, and 14.1-73.37 FIPS through 14.1-73.41 FIPS are affected only when configured as a SAML IdP.
 (CVE-2026-107406)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to NetScaler ADC or NetScaler Gateway version 13.1-64.29, 14.1-73.46, 13.1-37.283-FIPS, 13.1-37.283-NDcPP, or 14.1-73.46-FIPS or later.

See Also

http://www.nessus.org/u?11ad6f94

Plugin Details

Severity: Critical

ID: 366457

File Name: netscaler_adc_gateway_CTX697191.nasl

Version: 1.1

Type: Combined

Family: CGI abuses

Published: 10/16/2026

Updated: 10/16/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.34

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-107406

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4

Risk Factor: Critical

Base Score: 9.5

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L

Vulnerability Information

CPE: cpe:/h:citrix:netscaler_application_delivery_controller, cpe:/h:citrix:netscaler_gateway

Required KB Items: Host/NetScaler/Detected

Patch Publication Date: 10/8/2026

Vulnerability Publication Date: 10/8/2026

Reference Information

CVE: CVE-2026-107406

IAVA: 2026-A-1120