# CVE-2026-107406: Memory overflow vulnerability leading to Remote Code Execution or Denial of Service

> Memory overflow in NetScaler ADC allows remote code execution or denial of service when configured as SAML SP or IdP.

- **Severity:** Critical 9.5 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2026
- **Updated:** 10 Oct 2026
- **Also known as:** GHSA-x62m-6223-4vq2

## What is CVE-2026-107406?

CVE-2026-107406 is a critical memory corruption vulnerability in NetScaler ADC, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Memory overflow vulnerability leading to Remote Code Execution or Denial of Service Vulnerability in NetScaler ADC.

NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements:

 

  *  For the following versions: Applicable only when configured as a SAML IdP:
  *  NetScaler ADC and NetScaler Gateway between 14.1-73.37 and 14.1-73.41, inclusive
  *  NetScaler ADC 14.1-FIPS between 14.1-73.37 FIPS and 14.1-73.41 FIPS, inclusive
  *  NetScaler ADC and NetScaler Gateway between 13.1-64.23 and 13.1-64.28, inclusive
  *  NetScaler ADC 13.1-FIPS between 13.1-NDcPP 13.1-37.279 and 13.1- 37.282, inclusive

 

For the following versions: Applicable only when configured as a SAML SP or SAML IdP:

  *  NetScaler ADC and NetScaler Gateway before 14.1-73.37 
  *  NetScaler ADC 14.1-FIPS before 14.1-73.37 FIPS 
  *  NetScaler ADC and NetScaler Gateway before 13.1-64.23
  *  NetScaler ADC 13.1-FIPS before13.1-NDcPP 13.1-37.279

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-107406?


## How do I fix CVE-2026-107406?

No fix has been published for CVE-2026-107406 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-107406 being exploited?

There is no known exploitation of CVE-2026-107406 in the wild and no public exploit code.

Public exploit code:

- A complete guide and workflow for integrating Agile sprints with DevOps CI/CD pipelines. (github_poc): https://github.com/techupdate24/citrix-netscaler-rce-cve-2026-107406

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107406 and fix it if it is affected.

What it is: CVE-2026-107406 is a critical memory corruption vulnerability in NetScaler ADC, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-107406 in the wild and no public exploit code.

Affected product: NetScaler ADC. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-107406/ (Markdown: https://insights.sbomify.com/CVE-2026-107406/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107406
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107406
- OSV: https://osv.dev/vulnerability/CVE-2026-107406

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-107406/
Summaries are generated and may contain mistakes; the official description above is the record.