CVE-2022-27644: NETGEAR CBR40 Firmware

High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days.

This vulnerability allows network-adjacent attackers to compromise the integrity of downloaded information on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the downloading of files via HTTPS. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-15797.

Affected products

NETGEAR CBR40 Firmware: before 2.5.0.28 (fixed in 2.5.0.28)
NETGEAR LBR1020 Firmware: before 2.7.4.2 (fixed in 2.7.4.2)
NETGEAR LBR20 Firmware: before 2.7.4.2 (fixed in 2.7.4.2)
NETGEAR r6400 Firmware: before 1.0.4.126 (fixed in 1.0.4.126)
NETGEAR r6700 Firmware: before 1.0.4.126 (fixed in 1.0.4.126)
NETGEAR r6900p Firmware: before 1.3.3.148 (fixed in 1.3.3.148)
NETGEAR r7000 Firmware: before 1.0.11.134 (fixed in 1.0.11.134)
NETGEAR r7000p Firmware: before 1.3.3.148 (fixed in 1.3.3.148)
NETGEAR r7850 Firmware: before 1.0.5.84 (fixed in 1.0.5.84)
NETGEAR r7960p Firmware: before 1.4.3.88 (fixed in 1.4.3.88)
NETGEAR r8000 Firmware: before 1.0.4.84 (fixed in 1.0.4.84)
NETGEAR r8000p Firmware: before 1.4.3.88 (fixed in 1.4.3.88)
NETGEAR RAX200 Firmware: before 1.0.6.138 (fixed in 1.0.6.138)
NETGEAR RAX75 Firmware: before 1.0.6.138 (fixed in 1.0.6.138)
NETGEAR RAX80 Firmware: before 1.0.6.138 (fixed in 1.0.6.138)
NETGEAR RBR10 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RBR20 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RBR40 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RBR50 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RBS10 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RBS20 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RBS40 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RBS50 Firmware: before 2.7.4.24 (fixed in 2.7.4.24)
NETGEAR RS400 Firmware: before 1.5.1.86 (fixed in 1.5.1.86)

Published 2023-03-29. Last modified 2026-06-17.