# CVE-2021-42313: Microsoft Defender for IoT Remote Code Execution Vulnerability

> An attacker can execute arbitrary code remotely via SQL injection in Microsoft Defender for IoT.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rwv9-gxrh-r43w

## What is CVE-2021-42313?

CVE-2021-42313 is a critical SQL injection vulnerability in Microsoft Defender for IoT, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Microsoft Defender for IoT Remote Code Execution Vulnerability

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2021-42313?

It affects 1 product.


Products: Microsoft Defender for Iot.

## How do I fix CVE-2021-42313?

No fix has been published for CVE-2021-42313 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-42313 being exploited?

There is no known exploitation of CVE-2021-42313 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Defender for IoT

- [CVE-2021-42311](https://insights.sbomify.com/CVE-2021-42311/): Microsoft Defender for IoT Remote Code Execution Vulnerability (critical 10.0)
- [CVE-2024-38089](https://insights.sbomify.com/CVE-2024-38089/): Microsoft Defender for IoT Elevation of Privilege Vulnerability (critical 9.1)
- [CVE-2021-43882](https://insights.sbomify.com/CVE-2021-43882/): Microsoft Defender for IoT Remote Code Execution Vulnerability (critical 9.0)
- [CVE-2024-21323](https://insights.sbomify.com/CVE-2024-21323/): Microsoft Defender for IoT Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-29053](https://insights.sbomify.com/CVE-2024-29053/): Microsoft Defender for IoT Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-42313 and fix it if it is affected.

What it is: CVE-2021-42313 is a critical SQL injection vulnerability in Microsoft Defender for IoT, published on 15 Dec 2021. 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-2021-42313 in the wild and no public exploit code.

Affected product: Microsoft Defender for IoT. 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-2021-42313/ (Markdown: https://insights.sbomify.com/CVE-2021-42313/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42313
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42313
- OSV: https://osv.dev/vulnerability/CVE-2021-42313

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-42313/
Summaries are generated and may contain mistakes; the official description above is the record.