---
title: "CVE-2020-15415: DrayTek Multiple Vigor Routers OS Command Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2020-15415/
description: "CVE-2020-15415 (DrayTek Multiple Vigor Routers): Exploited in the wild (CISA KEV). On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1…"
type: vulnerability-record
section: "Security Digest"
date_published: 2020-06-30
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2020-15415"
kev: true
cvss: 9.8
epss: 0.8448
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run DrayTek Multiple Vigor Routers. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-09-30, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-10-21 ; treat that as the outer limit, not the target.
- EPSS 84.5% , percentile 99.7: FIRST’s model estimates a 84.5% chance of exploitation activity in the next 30 days, higher than 99.7% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

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.

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2024-09-30; federal due date 2024-10-21. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 84.48% probability of exploitation activity in the next 30 days; percentile 99.7.

## Sources

- [Listed in CISA KEV notes (draytek.com)](https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-remote-code-injection/execution-vulnerability-(cve-2020-14472)
- [CVE.org record CVE-2020-15415](https://www.cve.org/CVERecord?id=CVE-2020-15415)
- [NVD entry CVE-2020-15415](https://nvd.nist.gov/vuln/detail/CVE-2020-15415)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-15415)
- [draytek.com](https://www.draytek.com/about/security-advisory)
- [github.com](https://github.com/CLP-team/Vigor-Commond-Injection)

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Source page: https://erroneo.us/security/cve/CVE-2020-15415/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt