# CVE-2020-8515

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.

- Page: https://www.vulneraibility.com/cve/CVE-2020-8515
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03
- EPSS: 99.99% (percentile 100.0)
- Public exploit code: 1 on Exploit-DB · 3 GitHub proofs of concept · 1 Nuclei template (first 2020-03-30)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-04)
- Weakness: CWE-78
- Published: 2020-02-01

## Affected

- draytek:vigor2960_firmware
- draytek:vigor300b_firmware
- draytek:vigor3900_firmware

## References

- [other] https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html
- [other] https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/
- [other] http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.