CVE-2026-8451

HIGH

Published Jun 30, 2026 Modified Jul 1, 2026 CWE-125

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 v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0050

Probability of exploitation

0.39%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
citrix	netscaler_application_delivery_controller	< 13.1-37.272
citrix	netscaler_application_delivery_controller	< 13.1-37.272
citrix	netscaler_application_delivery_controller	13.1 — 13.1-63.18
citrix	netscaler_application_delivery_controller	14.1 — 14.1-72.61
citrix	netscaler_application_delivery_controller	All
citrix	netscaler_gateway	13.1 — 13.1-63.18
citrix	netscaler_gateway	14.1 — 14.1-72.61

References

Advisories & Patches

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

Frequently Asked Questions

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 It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-8451? +

CVE-2026-8451 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0050, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-8451? +

CVE-2026-8451 affects products from citrix, specifically: netscaler_application_delivery_controller, netscaler_gateway. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-8451? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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