CVE-2021-20731: Buffalo Wsr-1166dhp3 Firmware

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior allow an attacker to execute arbitrary OS commands with root privileges via unspecified vectors.

Affected products

• Buffalo Wsr-1166dhp3 Firmware: up to and including 1.16
• Buffalo Wsr-1166dhp4 Firmware: up to and including 1.02

Published 2021-06-09. Last modified 2026-06-17.