CVE-2022-21173: Elecom Wrh-300bk3-S Firmware

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Hidden functionality vulnerability in ELECOM LAN routers (WRH-300BK3 firmware v1.05 and earlier, WRH-300WH3 firmware v1.05 and earlier, WRH-300BK3-S firmware v1.05 and earlier, WRH-300DR3-S firmware v1.05 and earlier, WRH-300LB3-S firmware v1.05 and earlier, WRH-300PN3-S firmware v1.05 and earlier, WRH-300WH3-S firmware v1.05 and earlier, and WRH-300YG3-S firmware v1.05 and earlier) allows an attacker on the adjacent network to execute an arbitrary OS command via unspecified vectors.

Affected products

• Elecom Wrh-300bk3-S Firmware: up to and including 1.05
• Elecom Wrh-300bk3 Firmware: up to and including 1.05
• Elecom Wrh-300dr3-S Firmware: up to and including 1.05
• Elecom Wrh-300lb3-S Firmware: up to and including 1.05
• Elecom Wrh-300pn3-S Firmware: up to and including 1.05
• Elecom Wrh-300wh3-S Firmware: up to and including 1.05
• Elecom Wrh-300wh3 Firmware: up to and including 1.05
• Elecom Wrh-300yg3-S Firmware: up to and including 1.05

Published 2022-02-08. Last modified 2026-06-17.