CVE-2022-27644

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-03-29 · updated 2026-06-17
Weakness: CWE-295

Description

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: 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: before 1.0.11.134 — fixed in 1.0.11.134
NETGEAR R7000P: 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

How to fix

Upgrade to a fixed version: NETGEAR Cbr40 Firmware 2.5.0.28; NETGEAR Lbr1020 Firmware 2.7.4.2; NETGEAR Lbr20 Firmware 2.7.4.2; NETGEAR R6400 Firmware 1.0.4.126; NETGEAR R6700 1.0.4.126; NETGEAR R6900P Firmware 1.3.3.148; NETGEAR R7000 1.0.11.134; NETGEAR R7000P 1.3.3.148; NETGEAR R7850 Firmware 1.0.5.84; NETGEAR R7960P Firmware 1.4.3.88; NETGEAR R8000 Firmware 1.0.4.84; NETGEAR R8000P Firmware 1.4.3.88. Check the vendor advisory for mitigations.

References

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