CVE-2020-14473

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-06-24 · updated 2026-06-17
Weakness: CWE-787

Description

Stack-based buffer overflow vulnerability in Vigor3900, Vigor2960, and Vigor300B with firmware before 1.5.1.1.

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://github.com/Cossack9989/Vulns/blob/master/IoT/CVE-2020-14473.md
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29
https://github.com/Cossack9989/Vulns/blob/master/IoT/CVE-2020-14473.md
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29

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