# CVE-2026-76465: Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability

> Unauthenticated remote attackers can execute arbitrary code with root privileges or cause denial of service on Cisco Nexus switches via crafted MPLS packets.

- **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-74h7-6gf3-j457

## What is CVE-2026-76465?

CVE-2026-76465 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 MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to improper validation when an affected device is processing an MPLS echo-request packet. An attacker could exploit this vulnerability by sending a crafted MPLS echo-request to an IP address on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a device reload and a DoS condition.

Weakness: CWE-590 (Free of Memory not on the Heap)

## Which versions are affected by CVE-2026-76465?


## How do I fix CVE-2026-76465?

No fix has been published for CVE-2026-76465 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76465 being exploited?

There is no known exploitation of CVE-2026-76465 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76465 and fix it if it is affected.

What it is: CVE-2026-76465 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-2026-76465 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-2026-76465/ (Markdown: https://insights.sbomify.com/CVE-2026-76465/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76465
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76465
- OSV: https://osv.dev/vulnerability/CVE-2026-76465

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-76465/
Summaries are generated and may contain mistakes; the official description above is the record.