CVE-2020-5548: Yamaha FWX120 Firmware

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Yamaha LTE VoIP Router(NVR700W firmware Rev.15.00.15 and earlier), Yamaha Gigabit VoIP Router(NVR510 firmware Rev.15.01.14 and earlier), Yamaha Gigabit VPN Router(RTX810 firmware Rev.11.01.33 and earlier, RTX830 firmware Rev.15.02.09 and earlier, RTX1200 firmware Rev.10.01.76 and earlier, RTX1210 firmware Rev.14.01.33 and earlier, RTX3500 firmware Rev.14.00.26 and earlier, and RTX5000 firmware Rev.14.00.26 and earlier), Yamaha Broadband VoIP Router(NVR500 firmware Rev.11.00.38 and earlier), and Yamaha Firewall(FWX120 firmware Rev.11.03.27 and earlier) allow remote attackers to cause a denial of service via unspecified vectors.

Affected products

• Yamaha FWX120 Firmware: up to and including 11.03.27
• Yamaha NVR500 Firmware: up to and including 11.00.38
• Yamaha NVR510 Firmware: up to and including 15.01.14
• Yamaha NVR700W Firmware: up to and including 15.00.15
• Yamaha RTX1200 Firmware: up to and including 10.01.76
• Yamaha RTX1210 Firmware: up to and including 14.01.33
• Yamaha RTX3500 Firmware: up to and including 14.00.26
• Yamaha RTX5000 Firmware: up to and including 14.00.26
• Yamaha RTX810 Firmware: up to and including 11.01.33
• Yamaha RTX830 Firmware: up to and including 15.02.09

Published 2020-04-01. Last modified 2026-06-17.