Detections
Analytics

NetScaler ADC and NetScaler Gateway 13.1 < 13.1-64.23 / 14.1 < 14.1-73.37 Multiple Vulnerabilities

critical Nessus Plugin ID 350844

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Synopsis

The remote device is affected by multiple vulnerabilities.

Description

The remote NetScaler ADC (formerly Citrix ADC) or NetScaler Gateway (formerly Citrix Gateway) device is version 13.1 prior to 13.1-64.23, 14.1 prior to 14.1-73.37, 13.1-FIPS/NDcPP prior to 13.1-37.279, or 14.1-FIPS prior to 14.1-73.37. It is, therefore, affected by multiple vulnerabilities:

 - A remote code execution vulnerability due to improper input validation that can allow an unauthenticated attacker to execute arbitrary commands. All NetScaler ADC and NetScaler Gateway deployments, including the default configuration, are affected. This vulnerability has been observed to be exploited in the wild.
 (CVE-2026-88771)

 - A memory overflow vulnerability leading to remote code execution or denial of service when DTLS is enabled on NetScaler ADC or NetScaler Gateway. This vulnerability has been observed to be exploited in the wild.
 (CVE-2026-88772)

 - An HTTP request smuggling vulnerability affecting deployments that use LB, CS, VPN, or Authentication virtual servers of type HTTP or SSL. (CVE-2026-88773)

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

Solution

Upgrade to NetScaler ADC or NetScaler Gateway version 13.1-64.23, 14.1-73.37, 13.1-37.279-FIPS, 13.1-37.279-NDcPP, or 14.1-73.37-FIPS or later.

See Also

http://www.nessus.org/u?f6b07bd9

Plugin Details

Severity: Critical

ID: 350844

File Name: netscaler_adc_gateway_cve-2026-88771.nasl

Version: 1.5

Type: Combined

Family: CGI abuses

Published: 9/27/2026

Updated: 10/12/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

Percentile: 99.87

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

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

CVSS Score Source: CVE-2026-88777

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9.3

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

CVSS Score Source: CVE-2026-88773

CVSS v4

Risk Factor: Critical

Base Score: 9.5

Threat Score: 9.5

Threat Vector: CVSS:4.0/E:A

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:H

CVSS Score Source: CVE-2026-88772

Vulnerability Information

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

Required KB Items: Host/NetScaler/Detected

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/27/2026

Vulnerability Publication Date: 9/27/2026

CISA Known Exploited Vulnerability Due Dates: 9/30/2026

Exploitable With

Core Impact

Reference Information

CVE: CVE-2026-88771, CVE-2026-88772, CVE-2026-88773, CVE-2026-88774, CVE-2026-88775, CVE-2026-88776, CVE-2026-88777, CVE-2026-88778

IAVA: 2026-A-1057