# CVE-2021-36283: Other in CPG BIOS

> A local attacker can exploit improper input validation in Dell BIOS to execute arbitrary code in SMRAM, requiring a firmware patch.

- **Severity:** High 7.5 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/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:** 28 Sep 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-v8xg-293g-mwp4

## What is CVE-2021-36283?

CVE-2021-36283 is a high-severity vulnerability in Dell Chengming 3990 Firmware, published on 28 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Dell BIOS contains an improper input validation vulnerability. A local authenticated malicious user may potentially exploit this vulnerability by using an SMI to gain arbitrary code execution in SMRAM.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-36283?

It affects 85 products.


Products: Dell Chengming 3990 Firmware, Dell Chengming 3991 Firmware, Dell G3 15 3500 Firmware, Dell G3 15 3590 Firmware, Dell G3 15 5500 Firmware, Dell Inspiron 3493 Firmware, Dell Inspiron 3501 Firmware, Dell Inspiron 3593 Firmware, Dell Inspiron 3793 Firmware, Dell Inspiron 3880 Firmware, Dell Inspiron 3881 Firmware, Dell Inspiron 5400 2-in-1 Firmware, Dell Inspiron 5490 Firmware, Dell Inspiron 5493 Firmware, Dell Inspiron 5498 Firmware, Dell Inspiron 5590 Firmware, Dell Inspiron 5593 Firmware, Dell Inspiron 5598 Firmware, Dell Inspiron 7391 2-in-1 Firmware, Dell Inspiron 7500 2-in-1 Silver Firmware and 65 more.

## How do I fix CVE-2021-36283?

No fix has been published for CVE-2021-36283 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-36283 being exploited?

There is no known exploitation of CVE-2021-36283 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-36283 and fix it if it is affected.

What it is: CVE-2021-36283 is a high-severity vulnerability in Dell Chengming 3990 Firmware, published on 28 Sep 2021. 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-2021-36283 in the wild and no public exploit code.

Affected product: Dell Chengming 3990 Firmware. 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-2021-36283/ (Markdown: https://insights.sbomify.com/CVE-2021-36283/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-36283
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-36283
- OSV: https://osv.dev/vulnerability/CVE-2021-36283

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-36283/
Summaries are generated and may contain mistakes; the official description above is the record.