CVE-2026-88776

Undergoing Analysis Undergoing Analysis - In Progress

Buffer Overflow in Citrix NetScaler ADC and Gateway

Publication date: 2026-09-27

Last updated on: 2026-09-28

Assigner: NetScaler

Description

Memory overflow vulnerability 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 unpredictable or erroneous behavior or Denial of Service

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-27

Last Modified

2026-09-28

Generated

2026-09-28

AI Q&A

2026-09-27

EPSS Evaluated

N/A

NVD

CVE-2026-88776

EUVD

EUVD-2026-87971

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-119	The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

Executive Summary

This is a memory overflow vulnerability in Citrix NetScaler ADC and NetScaler Gateway. It allows attackers to cause unpredictable behavior, errors, or Denial of Service by exploiting memory handling flaws in unpatched 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 against the affected versions listed in the CVE. Use commands like 'show version' on the NetScaler CLI to verify the software version.

Impact Analysis

If exploited, this vulnerability could crash systems, disrupt services, or allow unauthorized access. Users relying on affected Citrix NetScaler versions may experience downtime or security breaches.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with GDPR, HIPAA, or other standards. However, memory overflow vulnerabilities can lead to data breaches or unauthorized access, which may violate GDPR's data protection requirements or HIPAA's security rules for protected health information.

Mitigation Strategies

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

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