CVE-2020-8515

critical

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.

References

https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html

https://www.securityweek.com/questions-remain-over-attacks-causing-draytek-router-reboots/

https://thehackernews.com/2025/03/cisa-flags-two-six-year-old-sitecore.html

https://www.greynoise.io/blog/in-the-wild-activity-against-draytek-routers

https://thehackernews.com/2025/01/hackers-exploit-zero-day-in-cnpilot.html

https://www.forescout.com/resources/draybreak-draytek-research/

https://blog.xlab.qianxin.com/catddos-derivative-en/

https://thehackernews.com/2023/12/behind-scenes-of-matveevs-ransomware.html

https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF

https://thehackernews.com/2024/12/cisa-and-fbi-raise-alerts-on-exploited.html

https://www.tenable.com/blog/government-agencies-warn-of-state-sponsored-actors-exploiting-publicly-known-vulnerabilities

https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/

http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html

Details

Source: Mitre, NVD

Published: 2020-02-01

Updated: 2025-02-04

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.94357