# CVE-2021-28813: Insufficiently Protected Credentials Vulnerability in QSW-M2116P-2T2S and QuNetSwitch

> Remote attackers can read sensitive information from QNAP switches due to insecure storage of credentials, requiring firmware upgrades to mitigate.

- **Severity:** Critical 9.6 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-v5xc-jmcq-c9fm

## What is CVE-2021-28813?

CVE-2021-28813 is a critical vulnerability in QNAP Systems Inc. QSW-M2116P-2T2S, published on 10 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability involving insecure storage of sensitive information has been reported to affect QSW-M2116P-2T2S and QNAP switches running QuNetSwitch. If exploited, this vulnerability allows remote attackers to read sensitive information by accessing the unrestricted storage mechanism.We have already fixed this vulnerability in the following versions: QSW-M2116P-2T2S 1.0.6 build 210713 and later QGD-1600P: QuNetSwitch 1.0.6.1509 and later QGD-1602P: QuNetSwitch 1.0.6.1509 and later QGD-3014PT: QuNetSwitch 1.0.6.1519 and later

Weakness: CWE-922 (Insecure Storage of Sensitive Information), CWE-798 (Use of Hard-coded Credentials), CWE-522 (Insufficiently Protected Credentials), CWE-259 (Use of Hard-coded Password)

## Which versions are affected by CVE-2021-28813?

It affects 2 products.


Products: Qnap Qsw-M2116p-2t2s Firmware, Qnap Qunetswitch.

## How do I fix CVE-2021-28813?

No fix has been published for CVE-2021-28813 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-28813 being exploited?

There is no known exploitation of CVE-2021-28813 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28813 and fix it if it is affected.

What it is: CVE-2021-28813 is a critical vulnerability in QNAP Systems Inc. QSW-M2116P-2T2S, published on 10 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-28813 in the wild and no public exploit code.

Affected product: QNAP Systems Inc. QSW-M2116P-2T2S. 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-2021-28813/ (Markdown: https://insights.sbomify.com/CVE-2021-28813/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28813
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28813
- OSV: https://osv.dev/vulnerability/CVE-2021-28813

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28813/
Summaries are generated and may contain mistakes; the official description above is the record.