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Vulnerability record · CVE-2026-8451 · published 30 June 2026

CVE-2026-8451: Citrix netscaler application delivery controller out-of-bounds read vulnerability

Citrix · Netscaler Application Delivery Controller

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

8.8 CVSS 4.0 High EPSS 14% · top 3.4% CWE-125 · Out-of-bounds read
8.8CVSS 4.0 base score
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
1References
1 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-3519Citrix NetScaler ADC and Gateway unauthenticated code injectionCitrix NetScaler ADC and NetScaler Gateway contain a code injection flaw (CWE-94) that allows unauthenticated remote code execution. The vendor bulle…KEVEPSS 100%analysed9.5CVE-2026-88772Citrix netscaler application delivery controller memory buffer overflow vulnerabilityVulnerability 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 F…KEVEPSS 77%9.5CVE-2026-88771Citrix netscaler application delivery controller improper input validation vulnerabilityImproper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-…KEVEPSS 82%9.3CVE-2026-19490Citrix NetScaler ADC and Gateway authentication bypass via alternate pathNetScaler ADC and NetScaler Gateway contain an authentication bypass via an alternate path or channel (CWE-288). The flaw is remotely reachable witho…KEVEPSS 33%analysed9.3CVE-2026-3055Citrix NetScaler ADC and Gateway SAML IDP memory overreadNetScaler ADC and NetScaler Gateway, when configured as a SAML identity provider, fail to validate input sufficiently, causing an out-of-bounds memor…KEVEPSS 91%analysed9.3CVE-2025-5777Citrix NetScaler ADC/Gateway memory overread via insufficient input validationCVE-2025-5777 is an insufficient input validation flaw in Citrix NetScaler ADC and NetScaler Gateway that causes a memory overread when the appliance…KEVEPSS 100%analysed9.2CVE-2025-7775Citrix NetScaler memory overflow allows remote code executionNetScaler ADC and NetScaler Gateway contain a memory buffer overflow (CWE-119) that can lead to remote code execution or denial of service. It affect…KEVEPSS 21%analysed9.2CVE-2025-6543Citrix NetScaler ADC and Gateway memory overflow allows control flow hijack and DoSNetScaler ADC and NetScaler Gateway contain a memory buffer overflow (CWE-119) that causes unintended control flow and denial of service. It affects …KEVEPSS 10%analysed

Source: NIST National Vulnerability Database (record CVE-2026-8451), CISA KEV, FIRST EPSS (scores of 2026-11-13). This page is refreshed as NVD updates the record.