CVE-2026-8451 | defend.network

What is CVE-2026-8451?

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

CVSS7.5 NVD 3.1

SeverityHIGH

ExploitationNo exploitation reported

EPSS1% · P40

Triage statusNo Known Exploit

ActionPatch this week

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD published2026-06-30

NVD last modified2026-07-01

Timeline

2026-06-30Published to the U.S. National Vulnerability Database (NVD)
2026-07-01NVD record last updated

Affected product

Citrix Netscaler Application Delivery Controller

NVD also lists CPE entries for: Citrix Netscaler Application Delivery Controller, Citrix Netscaler Gateway

Remediation Steps

Apply Citrix security updates to all NetScaler ADC and Gateway instances
Verify the patched version is running on all edge appliances
Restrict network access to NetScaler administrative interfaces
Monitor for unauthorized file access attempts in appliance logs

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 5 of June 2026 (June 29 – July 5)

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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.