# CVE-2021-21744: Misconfiguration in MF971R

> An attacker can modify configuration parameters on the ZTE MF971R to disable security functions, bypassing intended protections.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-658m-w6cm-wwr4

## What is CVE-2021-21744?

CVE-2021-21744 is a high-severity vulnerability in MF971R, published on 20 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ZTE MF971R product has a configuration file control vulnerability. An attacker could use this vulnerability to modify the configuration parameters of the device, causing some security functions of the device to be disabled.

## Which versions are affected by CVE-2021-21744?

It affects 1 product.


Products: Zte Mf971r Firmware.

## How do I fix CVE-2021-21744?

No fix has been published for CVE-2021-21744 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-21744 being exploited?

There is no known exploitation of CVE-2021-21744 in the wild and no public exploit code.

## Other vulnerabilities in MF971R

- [CVE-2021-21748](https://insights.sbomify.com/CVE-2021-21748/): Memory corruption in MF971R (critical 9.8)
- [CVE-2021-21749](https://insights.sbomify.com/CVE-2021-21749/): Memory corruption in MF971R (critical 9.8)
- [CVE-2021-21746](https://insights.sbomify.com/CVE-2021-21746/): Cross-site scripting in MF971R (medium 6.1)
- [CVE-2021-21747](https://insights.sbomify.com/CVE-2021-21747/): Cross-site scripting in MF971R (medium 6.1)
- [CVE-2021-21743](https://insights.sbomify.com/CVE-2021-21743/): Other in MF971R (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21744 and fix it if it is affected.

What it is: CVE-2021-21744 is a high-severity vulnerability in MF971R, published on 20 Oct 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-2021-21744 in the wild and no public exploit code.

Affected product: MF971R. 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-2021-21744/ (Markdown: https://insights.sbomify.com/CVE-2021-21744/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21744
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21744
- OSV: https://osv.dev/vulnerability/CVE-2021-21744

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21744/
Summaries are generated and may contain mistakes; the official description above is the record.