Updated July 28, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Patch tracker / CVE reference / CVE-2026-8451

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

Risk summary

High

7.5

CVSS v3 base

High

Severity

Not listed

Actively exploited

Vulnerability, CVSS 7.5 (High).

How to fix CVE-2026-8451 Admin questions

Senserva AI Opinion and rich prompt for CVE-2026-8451

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2026-8451 (source: https://senserva.com/cve/CVE-2026-8451.html, data from CISA KEV and NVD, refreshed twice a day (morning and afternoon US Central)):
- CVE-2026-8451: High severity vulnerability, CVSS 7.5
- Actively exploited (CISA KEV): no
- Affected: Citrix Netscaler application delivery controller
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

How to fix CVE-2026-8451

Update Citrix Netscaler Application Delivery Controller to version 13.1-37.272 or later. Update Citrix Netscaler Application Delivery Controller to version 13.1-63.18 or later. Update Citrix Netscaler Application Delivery Controller to version 14.1-72.61 or later. (Fixed-version data from NVD.) Where a workaround exists, apply it only until the update is deployed, not as a substitute.

Vendor advisory NVD detail

Common questions about CVE-2026-8451

Is CVE-2026-8451 actively exploited?

It is not currently listed in the CISA Known Exploited Vulnerabilities catalog. That can change: unexploited CVEs regularly get weaponized months after disclosure, which is why patching on your normal cadence matters.

What fixes CVE-2026-8451?

Update Citrix Netscaler Application Delivery Controller to version 13.1-37.272 or later. Update Citrix Netscaler Application Delivery Controller to version 13.1-63.18 or later. Update Citrix Netscaler Application Delivery Controller to version 14.1-72.61 or later. Fixed-version data from NVD; the vendor advisory linked on this page has the details.

Which products are affected by CVE-2026-8451?

Citrix Netscaler application delivery controller.

Can I ask my own AI about CVE-2026-8451?

Yes. This page includes a free, ready-to-paste AI prompt with CVE-2026-8451's key facts: severity, CVSS, CISA KEV status, and the affected products. Copy it into Claude, ChatGPT, or Copilot for a triage plan.

Scope and sources

Affected products

Citrix Netscaler application delivery controller

Authoritative references

CVE record NVD detail

Every Microsoft CVE and the patches that fix it, ranked by real-world risk: the Microsoft Patch Tracker. The full searchable CVE reference: CVE and vulnerability management.