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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0492
Denial of Service Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway

Original Issue Date:October 07, 2026

Severity Rating: HIGH

Software Affected

  • Citrix NetScaler ADC and Citrix NetScaler Gateway 14.1 before 14.1-73.41
  • Citrix NetScaler ADC and Citrix NetScaler Gateway 13.1 before 13.1-64.28
  • Citrix NetScaler ADC FIPS before 14.1-73.41 FIPS
  • Citrix NetScaler ADC FIPS and NDcPP before 13.1-37.282

Overview

A vulnerability has been reported in Citrix NetScaler ADC and Citrix NetScaler Gateway which could allow a remote attacker to cause denial of service (DoS) conditions on the targeted system.

Target Audience:
All end-user organizations and individuals using Citrix NetScaler ADC and NetScaler Gateway.

Risk Assessment:
High risk of denial-of-service condition.

Impact Assessment:
Potential for disruption of service.

Description

NetScaler ADC and NetScaler Gateway are application delivery controller (ADC) and secure remote access solutions used to provide load balancing, application delivery and VPN services for enterprise environments.

This vulnerability exists in Citrix NetScaler ADC and Citrix NetScaler Gateway due to a memory overflow weakness. A remote attacker could exploit these vulnerabilities by sending a specially crafted request to the targeted system.

Successful exploitation of these vulnerabilities could allow an attacker to cause denial of service (DoS) conditions on the targeted system.

Solution

Apply the security updates released by vendor:
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174

Vendor Information

Citrix
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174

References

Citrix
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174

CVE Name
CVE-2026-88779

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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