CVE-2021-20739: Elecom Wrc-300febk Firmware

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S all versions allows an unauthenticated network-adjacent attacker to execute an arbitrary OS command via unspecified vectors.

Affected products

• Elecom Wrc-300febk Firmware: any version
• Elecom Wrc-733febk Firmware: any version
• Elecom Wrc-f300nf Firmware: any version
• Elecom Wrh-300bk-S Firmware: any version
• Elecom Wrh-300bk Firmware: any version
• Elecom Wrh-300rd Firmware: any version
• Elecom Wrh-300sv Firmware: any version
• Elecom Wrh-300wh-S Firmware: any version
• Elecom Wrh-300wh Firmware: any version
• Elecom Wrh-h300bk Firmware: any version
• Elecom Wrh-h300wh Firmware: any version

Published 2021-07-07. Last modified 2026-06-17.