# CVE-2021-44971: Auth bypass in n/a

> Attackers can bypass authentication on Tenda routers to access sensitive information and potentially achieve remote code execution via chained command injection.

- **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:** 28 Jan 2022
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-cvxm-mgpf-m49w

## What is CVE-2021-44971?

CVE-2021-44971 is a critical authentication bypass vulnerability in Tenda Ac15 Firmware, published on 28 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0 Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on. an attacker can obtain sensitive information, and even combine it with authenticated command injection to implement RCE.

Weakness: CWE-697 (Incorrect Comparison)

## Which versions are affected by CVE-2021-44971?

It affects 2 products.


Products: Tenda Ac15 Firmware, Tenda Ac5 Firmware.

## How do I fix CVE-2021-44971?

No fix has been published for CVE-2021-44971 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-44971 being exploited?

There is no known exploitation of CVE-2021-44971 in the wild and no public exploit code.

## Other vulnerabilities in Tenda Ac15 Firmware

- [CVE-2020-10987](https://insights.sbomify.com/CVE-2020-10987/): Tenda AC1900 Router AC15 Model Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2026-24103](https://insights.sbomify.com/CVE-2026-24103/): Memory corruption in n/a (critical 9.8)
- [CVE-2026-24101](https://insights.sbomify.com/CVE-2026-24101/): Command injection in n/a (critical 9.8)
- [CVE-2026-24105](https://insights.sbomify.com/CVE-2026-24105/): Command injection in n/a (critical 9.8)
- [CVE-2025-63666](https://insights.sbomify.com/CVE-2025-63666/): Information disclosure in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-44971 and fix it if it is affected.

What it is: CVE-2021-44971 is a critical authentication bypass vulnerability in Tenda Ac15 Firmware, published on 28 Jan 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-2021-44971 in the wild and no public exploit code.

Affected product: Tenda Ac15 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-2021-44971/ (Markdown: https://insights.sbomify.com/CVE-2021-44971/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-44971
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-44971
- OSV: https://osv.dev/vulnerability/CVE-2021-44971

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-44971/
Summaries are generated and may contain mistakes; the official description above is the record.