Check Point Advisories

Citrix NetScaler Out Of Bounds Read (CVE-2026-8451)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-8298
Date Published:	2 Jul 2026
Severity:	High
Last Updated:	Thursday 02 July, 2026
Source:
Industry Reference:	CVE-2026-8451
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Citrix NetScaler ADC 14.1 prior to 72.61 Citrix NetScaler ADC 13.1 prior to 63.18 Citrix NetScaler ADC 14.1 FIPs prior to 72.61 Citrix NetScaler ADC 13.1 FIPS and NDcPP prior to 37.272 Citrix NetScaler Gateway 14.1 prior to 72.61 Citrix NetScaler Gateway 13.1 prior to 63.18
Vulnerability Description	An out of bounds read vulnerability in Citrix NetScaler when configured as a SAML IDP allows attackers to read memory contents, potentially exposing sensitive information.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Citrix NetScaler Out Of Bounds Read (CVE-2026-8451) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Citrix NetScaler Out Of Bounds Read (CVE-2026-8451)