# CVE-2020-8515: Multiple DrayTek Vigor Routers Web Management Page Vulnerability

> CVE-2020-8515: Multiple DrayTek Vigor Routers Web Management Page Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-8515
Last updated: 2025-10-21T23:35:52Z

- Published: 2020-02-01 12:36 UTC · Updated: 2025-10-21 23:35 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2021-11-03, federal due date 2022-05-03, ransomware use: Unknown

## Description

DrayTek Vigor2960 1.3.1\_Beta, Vigor3900 1.4.4\_Beta, and Vigor300B 1.3.3\_Beta, 1.4.2.1\_Beta, and 1.4.4\_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI. This issue has been fixed in Vigor3900/2960/300B v1.5.1.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- DrayTek: Multiple Vigor Routers

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-8515)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-8515)
- [http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html](http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html)
- [https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html](https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html)
- [https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/](https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515%29/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-8515 · Markdown: https://rewindex.com/cve/CVE-2020-8515.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-8515 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:01:47.269Z