# CVE-2021-45428: File upload in n/a

> An attacker can upload arbitrary files, including HTML and CGI, via the enabled PUT method on the TLR-2005KSH device.

- **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:** 3 Jan 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-hp88-wcmx-23jq

## What is CVE-2021-45428?

CVE-2021-45428 is a critical vulnerability in n/a, published on 3 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TLR-2005KSH is affected by an incorrect access control vulnerability. THe PUT method is enabled so an attacker can upload arbitrary files including HTML and CGI formats.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2021-45428?

It affects 1 product.


Products: Telesquare Tlr-2005ksh Firmware.

## How do I fix CVE-2021-45428?

No fix has been published for CVE-2021-45428 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45428 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-45428 exists.

Public exploit code:

- TLR-2005KSH - Arbitrary File Upload (exploitdb)
- https://github.com/projectforsix/CVE-2021-45428-Defacer (github_poc): https://github.com/projectforsix/CVE-2021-45428-Defacer
- Telesquare TLR-2005KSH 1.0.0 - Arbitrary File Upload (nuclei): http/cves/2021/CVE-2021-45428.yaml

## Other vulnerabilities in n/a

- [CVE-2025-26002](https://insights.sbomify.com/CVE-2025-26002/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-26003](https://insights.sbomify.com/CVE-2025-26003/): Command injection in n/a (critical 9.8)
- [CVE-2025-26004](https://insights.sbomify.com/CVE-2025-26004/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-26005](https://insights.sbomify.com/CVE-2025-26005/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-26006](https://insights.sbomify.com/CVE-2025-26006/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45428 and fix it if it is affected.

What it is: CVE-2021-45428 is a critical vulnerability in n/a, published on 3 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-45428 exists.

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-2021-45428/ (Markdown: https://insights.sbomify.com/CVE-2021-45428/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45428
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45428
- OSV: https://osv.dev/vulnerability/CVE-2021-45428

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45428/
Summaries are generated and may contain mistakes; the official description above is the record.