CVE-2021-45661: NETGEAR RBK20 Firmware

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Certain NETGEAR devices are affected by server-side injection. This affects RBK40 before 2.5.1.16, RBR40 before 2.5.1.16, RBS40 before 2.5.1.16, RBK20 before 2.5.1.16, RBR20 before 2.5.1.16, RBS20 before 2.5.1.16, RBK50 before 2.5.1.16, RBR50 before 2.5.1.16, RBS50 before 2.5.1.16, and RBS50Y before 2.6.1.40.

Affected products

• NETGEAR RBK20 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBK40 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBK50 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBR20 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBR40 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBR50 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBS20 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBS40 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBS50 Firmware: before 2.5.1.16 (fixed in 2.5.1.16)
• NETGEAR RBS50Y Firmware: before 2.6.1.40 (fixed in 2.6.1.40)

Published 2021-12-26. Last modified 2026-06-17.