# CVE-2026-76485: Cisco Nexus 3000 and 9000 Series Switches VXLAN OAM (NGOAM) Remote Code Execution Vulnerability

> Unauthenticated remote attackers can execute arbitrary code with root privileges or cause denial of service on Cisco Nexus switches if the VXLAN OAM feature is enabled.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Oct 2026
- **Updated:** 8 Oct 2026
- **Also known as:** GHSA-cpwq-8jv6-8vg5

## What is CVE-2026-76485?

CVE-2026-76485 is a critical memory corruption vulnerability in Cisco NX-OS Software, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a Denial-of-Service (DoS) on an affected device.

This vulnerability is due to improper input validation of IP traffic when the NGOAM feature is enabled. An attacker could exploit this vulnerability by sending crafted packets to an IP interface on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes resulting in a reload and DoS condition.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-76485?


## How do I fix CVE-2026-76485?

No fix has been published for CVE-2026-76485 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76485 being exploited?

There is no known exploitation of CVE-2026-76485 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76485 and fix it if it is affected.

What it is: CVE-2026-76485 is a critical memory corruption vulnerability in Cisco NX-OS Software, published on 7 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-2026-76485 in the wild and no public exploit code.

Affected product: Cisco NX-OS Software. 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-2026-76485/ (Markdown: https://insights.sbomify.com/CVE-2026-76485/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76485
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76485
- OSV: https://osv.dev/vulnerability/CVE-2026-76485

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76485/
Summaries are generated and may contain mistakes; the official description above is the record.