CVE-2021-20091: Buffalo Wsr-2533dhp3-Bk Firmware

High severity, CVSS 8.8. EPSS: 8.5% chance of exploitation in the next 30 days.

The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly sanitize user input. An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution.

Affected products

• Buffalo Wsr-2533dhp3-Bk Firmware: up to and including 1.24
• Buffalo Wsr-2533dhpl2-Bk Firmware: up to and including 1.02

Published 2021-04-29. Last modified 2026-06-17.