CVE-2026-88774

Modified Modified - Updated After Analysis

Buffer Overflow in Citrix NetScaler ADC and Gateway

Publication date: 2026-09-27

Last updated on: 2026-09-29

Assigner: NetScaler

Description

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 a feature policy bypass due to improper HTTP URL based expression usage.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-27

Last Modified

2026-09-29

Generated

2026-10-18

AI Q&A

2026-09-27

EPSS Evaluated

2026-10-16

NVD

CVE-2026-88774

EUVD

EUVD-2026-87960

Affected Vendors & Products

Vendor	Product	Version / Range
citrix	netscaler_application_delivery_controller	From 13.1 (inc) to 13.1-64.23 (exc)
citrix	netscaler_application_delivery_controller	From 14.1 (inc) to 14.1-73.37 (exc)
citrix	netscaler_application_delivery_controller	From 13.1 (inc) to 13.1.37.279 (exc)
citrix	netscaler_application_delivery_controller	From 14.1-66.68 (inc) to 14.1-73.37 (inc)
citrix	netscaler_application_delivery_controller	From 13.1 (inc) to 13.1.37.279 (exc)
citrix	netscaler_gateway	From 13.1 (inc) to 13.1-64.23 (exc)
citrix	netscaler_gateway	From 14.1 (inc) to 14.1-73.37 (exc)

Helpful Resources

Exploitability

CWE

KEV

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

Executive Summary

This vulnerability affects Citrix NetScaler ADC and Gateway products. It allows a feature policy bypass due to improper use of HTTP URL-based expressions. Affected versions include ADC before 14.1-73.37, 13.1-64.23, and their FIPS variants, as well as Gateway before 13.1-64.23.

Detection Guidance

To detect this vulnerability, check the version of Citrix NetScaler ADC or Gateway running on your system. Compare it against the affected versions listed in the CVE. Use commands like 'show version' on the NetScaler CLI or check the web interface under System Information. If your version is before 14.1-73.37, 13.1-64.23, or their FIPS equivalents, the system is vulnerable.

Impact Analysis

An attacker could exploit this to bypass security policies, potentially gaining unauthorized access to sensitive resources or data. The impact includes unauthorized actions, data exposure, or further network compromise depending on the environment.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations by enabling unauthorized access to personal or health data. Organizations may face penalties or legal consequences if exploited.

Mitigation Strategies

Update Citrix NetScaler ADC and Gateway to versions 14.1-73.37 or later, 13.1-64.23 or later, or the specified FIPS versions to address the feature policy bypass vulnerability.

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