CVE-2026-88771
Received Received - Intake

Improper Input Validation in Citrix NetScaler ADC and Gateway

Publication date: 2026-09-27

Last updated on: 2026-09-27

Assigner: NetScaler

Description
Improper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to an unauthenticated attacker to execute arbitrary commands.

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Meta Information

Published
2026-09-27
Last Modified
2026-09-27
Generated
2026-09-27
AI Q&A
2026-09-27
EPSS Evaluated
N/A
NVD
CVE-2026-88771
EUVD
EUVD-2026-87958

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
citrix netscaler_adc to 13.1.37.279 (exc)
citrix netscaler_gateway to 13.1-64.23 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

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Executive Summary

This is an improper input validation vulnerability in Citrix NetScaler ADC and Gateway. It allows an unauthenticated attacker to execute arbitrary commands due to insufficient checks on user-supplied input.

Detection Guidance

Detecting this vulnerability requires checking the version of Citrix NetScaler ADC or Gateway. Compare installed versions against the patched versions (ADC: 14.1-73.37, 13.1-64.23, or later; Gateway: same versions). Use commands like 'show version' on NetScaler CLI or check system information via GUI.

Impact Analysis

An attacker could exploit this to run malicious commands on affected systems, potentially leading to unauthorized access, data theft, or system compromise. It may also enable further network infiltration or disruption.

Compliance Impact

The vulnerability allows unauthenticated attackers to execute arbitrary commands, which could lead to unauthorized access, data breaches, or manipulation of sensitive information. This could violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security) by exposing personal or protected health information.

Mitigation Strategies

Update Citrix NetScaler ADC and Gateway to versions 14.1-73.37 or later, 13.1-64.23 or later, 14.1-73.37 FIPS or later, and 13.1.37.279 FIPS or later. Apply patches immediately to prevent unauthenticated command execution by attackers.

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