CVE-2026-88775

Modified Modified - Updated After Analysis

Memory Overflow in Citrix NetScaler ADC and Gateway

Publication date: 2026-09-27

Last updated on: 2026-09-29

Assigner: NetScaler

Description

Memory overflow 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 Memory overflow vulnerability leading to unpredictable or erroneous behavior or Denial of Service

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-2026-88775

EUVD

EUVD-2026-87962

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-120	The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Attack-Flow Graph

Executive Summary

This is a memory overflow vulnerability in Citrix NetScaler ADC and Gateway products. It allows attackers to cause unpredictable behavior or denial of service by exploiting memory handling issues in affected versions.

Detection Guidance

This vulnerability affects Citrix NetScaler ADC and Gateway versions before specific updates. To detect it, check the installed version of NetScaler ADC and Gateway using commands like 'show version' on the appliance. Compare the output against the affected versions listed in the CVE description (before 14.1-73.37, 13.1-64.23, etc.). If your version is outdated, the system is vulnerable.

Impact Analysis

The vulnerability can lead to system crashes, service disruptions, or unauthorized access to sensitive data. It may allow attackers to execute arbitrary code or cause denial of service conditions on vulnerable systems.

Compliance Impact

The memory overflow vulnerability in Citrix NetScaler ADC and Gateway could lead to Denial of Service or unpredictable behavior, potentially disrupting data processing and availability. This may impact compliance with GDPR (data availability) and HIPAA (system integrity and availability), depending on the affected system's role in handling sensitive data.

Mitigation Strategies

Update Citrix NetScaler ADC and Gateway to versions 14.1-73.37 or later for ADC and 13.1-64.23 or later for Gateway to address the memory overflow vulnerability.

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