CVE-2021-20852: Elecom Wrh-733gbk Firmware

Medium severity, CVSS 6.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Buffer overflow vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute an arbitrary OS command via unspecified vectors.

Affected products

• Elecom Wrh-733gbk Firmware: up to and including 1.02.9
• Elecom Wrh-733gwh Firmware: up to and including 1.02.9

Published 2021-12-01. Last modified 2026-06-17.