# CVE-2021-27444: Weintek EasyWeb cMT Improper Access Control

> Unauthenticated attackers can remotely access sensitive information and perform administrative actions on Weintek cMT devices due to improper access controls.

- **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:** 16 May 2022
- **Updated:** 16 Apr 2025
- **Also known as:** GHSA-f29h-wrwj-qwp2

## What is CVE-2021-27444?

CVE-2021-27444 is a critical missing authorization vulnerability in Weintek cMT-CTRL01, published on 16 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Weintek cMT product line is vulnerable to various improper access controls, which may allow an unauthenticated attacker to remotely access and download sensitive information and perform administrative actions on behalf of a legitimate administrator.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2021-27444?

It affects 16 products.


Products: Weintek Cmt-Ctrl01 Firmware, Weintek Cmt-Fhd Firmware, Weintek Cmt-G01 Firmware, Weintek Cmt-G02 Firmware, Weintek Cmt-G03 Firmware, Weintek Cmt-G04 Firmware, Weintek Cmt-Hdm Firmware, Weintek Cmt-Svr-100 Firmware, Weintek Cmt-Svr-102 Firmware, Weintek Cmt-Svr-200 Firmware, Weintek Cmt-Svr-202 Firmware, Weintek Cmt3071 Firmware, Weintek Cmt3072 Firmware, Weintek Cmt3090 Firmware, Weintek Cmt3103 Firmware, Weintek Cmt3151 Firmware.

## How do I fix CVE-2021-27444?

No fix has been published for CVE-2021-27444 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27444 being exploited?

There is no known exploitation of CVE-2021-27444 in the wild and no public exploit code.

## Other vulnerabilities in Weintek cMT-CTRL01

- [CVE-2021-27446](https://insights.sbomify.com/CVE-2021-27446/): Weintek EasyWeb cMT Code Injection (critical 10.0)
- [CVE-2021-27442](https://insights.sbomify.com/CVE-2021-27442/): Weintek EasyWeb cMT Cross-site Scripting (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27444 and fix it if it is affected.

What it is: CVE-2021-27444 is a critical missing authorization vulnerability in Weintek cMT-CTRL01, published on 16 May 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-2021-27444 in the wild and no public exploit code.

Affected product: Weintek cMT-CTRL01. 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-2021-27444/ (Markdown: https://insights.sbomify.com/CVE-2021-27444/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27444
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27444
- OSV: https://osv.dev/vulnerability/CVE-2021-27444

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27444/
Summaries are generated and may contain mistakes; the official description above is the record.