Memory Overread in NetScaler ADC and Gateway via SAML IDP

Publication date: 2026-06-30

Last updated on: 2026-07-01

Assigner: 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5

Description

Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread if NetScaler ADC or NetScaler Gateway is configured as a SAML IDP

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-30

Last Modified

2026-07-01

Generated

2026-07-21

AI Q&A

2026-06-30

EPSS Evaluated

2026-07-19

NVD

CVE-2026-8451

EUVD

EUVD-2026-40305

Affected Vendors & Products

Vendor	Product	Version / Range
citrix	netscaler_application_delivery_controller	From 13.1 (inc) to 13.1-63.18 (exc)
citrix	netscaler_application_delivery_controller	From 14.1 (inc) to 14.1-72.61 (exc)
citrix	netscaler_application_delivery_controller	to 13.1-37.272 (exc)
citrix	netscaler_application_delivery_controller	to 13.1-37.272 (exc)
citrix	netscaler_application_delivery_controller	14.1-66.68
citrix	netscaler_gateway	From 13.1 (inc) to 13.1-63.18 (exc)
citrix	netscaler_gateway	From 14.1 (inc) to 14.1-72.61 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is caused by insufficient input validation in NetScaler ADC and NetScaler Gateway when they are configured as a SAML Identity Provider (IDP). This flaw can lead to a memory overread, which means the system may read more memory than intended, potentially exposing sensitive information or causing unexpected behavior.

Impact Analysis

The impact of this vulnerability includes the possibility of unauthorized memory access due to the memory overread. This can lead to exposure of sensitive data stored in memory or cause instability in the affected systems. Given the high CVSS score of 8.8, the vulnerability is considered severe and could be exploited remotely without authentication.

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