What’s Vulnerable › Vulnerabilities

CVE-2020-14472

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-06-24 · updated 2026-06-17
• Weakness: CWE-77

Description

On Draytek Vigor3900, Vigor2960, and Vigor 300B devices before 1.5.1.1, there are some command-injection vulnerabilities in the mainfunction.cgi file.

Affected products

• DrayTek Vigor2960: before 1.5.1.1 — fixed in 1.5.1.1
• DrayTek Vigor 300B: before 1.5.1.1 — fixed in 1.5.1.1
• DrayTek Vigor3900 Firmware: before 1.5.1.1 — fixed in 1.5.1.1

How to fix

Upgrade to a fixed version: DrayTek Vigor2960 1.5.1.1; DrayTek Vigor 300B 1.5.1.1; DrayTek Vigor3900 Firmware 1.5.1.1. Check the vendor advisory for mitigations.

References

• https://gist.github.com/Cossack9989/fa9718434ceee4e6d4f6b0ad672c10f1
• https://gist.github.com/WinMin/46165779215f1d47ec257210428c0240
• https://gist.github.com/Cossack9989/fa9718434ceee4e6d4f6b0ad672c10f1
• https://gist.github.com/WinMin/46165779215f1d47ec257210428c0240

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