# CVE-2020-15415: DrayTek Multiple Vigor Routers OS Command Injection

> Remote attackers can execute arbitrary commands on DrayTek routers by injecting shell metacharacters into filenames during file uploads.

- **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:** Yes, since 30 Sep 2024 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Jun 2020
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-65hg-r7rx-55rg

## What is CVE-2020-15415?

CVE-2020-15415 is a critical command injection vulnerability in n/a, published on 30 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1, cgi-bin/mainfunction.cgi/cvmcfgupload allows remote command execution via shell metacharacters in a filename when the text/x-python-script content type is used, a different issue than CVE-2020-14472.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2020-15415?

It affects 3 products.


Products: Draytek Vigor2960 Firmware, Draytek Vigor300b Firmware, Draytek Vigor3900 Firmware.

## How do I fix CVE-2020-15415?

No fix has been published for CVE-2020-15415 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 21 Oct 2024.

## Is CVE-2020-15415 being exploited?

Yes. Attackers have exploited CVE-2020-15415 in the wild since at least 30 Sep 2024.

Public exploit code:

- DrayTek Vigor - Command Injection (nuclei): http/cves/2020/CVE-2020-15415.yaml

## Other vulnerabilities in n/a

- [CVE-2020-8515](https://insights.sbomify.com/CVE-2020-8515/): Multiple DrayTek Vigor Routers Web Management Page (critical 9.8, exploited in the wild)
- [CVE-2024-12987](https://insights.sbomify.com/CVE-2024-12987/): DrayTek Vigor Routers OS Command Injection (medium 6.9, exploited in the wild)
- [CVE-2021-42911](https://insights.sbomify.com/CVE-2021-42911/): Other in n/a (critical 9.8)
- [CVE-2021-43118](https://insights.sbomify.com/CVE-2021-43118/): Command injection in n/a (critical 9.8)
- [CVE-2020-14472](https://insights.sbomify.com/CVE-2020-14472/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-15415 and fix it if it is affected.

What it is: CVE-2020-15415 is a critical command injection vulnerability in n/a, published on 30 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2020-15415 in the wild since at least 30 Sep 2024.

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-2020-15415/ (Markdown: https://insights.sbomify.com/CVE-2020-15415/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15415
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15415
- OSV: https://osv.dev/vulnerability/CVE-2020-15415

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-15415/
Summaries are generated and may contain mistakes; the official description above is the record.