# CVE-2021-46319: Command injection in n/a

> Attackers can execute arbitrary commands on D-Link routers by bypassing input validation in SSID parameters using special characters.

- **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:** 17 Feb 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-mq76-pcfx-jm9r

## What is CVE-2021-46319?

CVE-2021-46319 is a critical command injection vulnerability in n/a, published on 17 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Remote Code Execution (RCE) vulnerability exists in D-Link Router DIR-846 DIR846A1_FW100A43.bin and DIR846enFW100A53DLA-Retail.bin. Malicious users can use this vulnerability to use "\ " or backticks to bypass the shell metacharacters in the ssid0 or ssid1 parameters to execute arbitrary commands.This vulnerability is due to the fact that CVE-2019-17509 is not fully patched and can be bypassed by using line breaks or backticks on its basis.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2021-46319?

It affects 1 product.


Products: Dlink Dir-846 Firmware.

## How do I fix CVE-2021-46319?

No fix has been published for CVE-2021-46319 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-46319 being exploited?

There is no known exploitation of CVE-2021-46319 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-46641](https://insights.sbomify.com/CVE-2022-46641/): Command injection in n/a (critical 9.9)
- [CVE-2022-46642](https://insights.sbomify.com/CVE-2022-46642/): Command injection in n/a (critical 9.9)
- [CVE-2023-33735](https://insights.sbomify.com/CVE-2023-33735/): Command injection in n/a (critical 9.8)
- [CVE-2020-21016](https://insights.sbomify.com/CVE-2020-21016/): Code injection in n/a (critical 9.8)
- [CVE-2021-46314](https://insights.sbomify.com/CVE-2021-46314/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-46319 and fix it if it is affected.

What it is: CVE-2021-46319 is a critical command injection vulnerability in n/a, published on 17 Feb 2022. 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-2021-46319 in the wild and no public exploit code.

Affected product: n/a. 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-2021-46319/ (Markdown: https://insights.sbomify.com/CVE-2021-46319/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-46319
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-46319
- OSV: https://osv.dev/vulnerability/CVE-2021-46319

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-46319/
Summaries are generated and may contain mistakes; the official description above is the record.