# CVE-2021-33126: Missing authorization in Intel(R) 700 and 722 Series Ethernet Controllers and Adapters

> A privileged local user can cause a denial of service in Intel Ethernet controllers due to improper access control in the firmware.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2022
- **Updated:** 5 May 2025
- **Also known as:** GHSA-8f6q-9972-q659

## What is CVE-2021-33126?

CVE-2021-33126 is a medium-severity missing authorization vulnerability in Intel(R) 700 and 722 Series Ethernet Controllers and Adapters, published on 18 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Improper access control in the firmware for some Intel(R) 700 and 722 Series Ethernet Controllers and Adapters before versions 8.5 and 1.5.5 may allow a privileged user to potentially enable denial of service via local access.

## Which versions are affected by CVE-2021-33126?

It affects 7 products.


Products: Intel Ethernet Controller V710 Firmware, Intel Ethernet Controller X710 Firmware, Intel Ethernet Controller Xl710 Firmware, Intel Ethernet Controller Xxv710 Firmware, Intel Ethernet Network Adapter X722da2 Firmware, Intel Ethernet Network Adapter X722da4fh Firmware, Intel Ethernet Network Adapter X722da4g1p5 Firmware.

## How do I fix CVE-2021-33126?

No fix has been published for CVE-2021-33126 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-33126 being exploited?

There is no known exploitation of CVE-2021-33126 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-33126 and fix it if it is affected.

What it is: CVE-2021-33126 is a medium-severity missing authorization vulnerability in Intel(R) 700 and 722 Series Ethernet Controllers and Adapters, published on 18 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-33126 in the wild and no public exploit code.

Affected product: Intel(R) 700 and 722 Series Ethernet Controllers and Adapters. 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-2021-33126/ (Markdown: https://insights.sbomify.com/CVE-2021-33126/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-33126
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-33126
- OSV: https://osv.dev/vulnerability/CVE-2021-33126

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-33126/
Summaries are generated and may contain mistakes; the official description above is the record.