CVE-2021-34947: NETGEAR d7800 Firmware

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

NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.

Affected products

NETGEAR d7800 Firmware: before 1.0.1.64 (fixed in 1.0.1.64)
NETGEAR EX2700 Firmware: before 1.0.1.66 (fixed in 1.0.1.66)
NETGEAR EX6100 Firmware: before 1.0.1.106 (fixed in 1.0.1.106)
NETGEAR EX6150 Firmware: before 1.0.1.106 (fixed in 1.0.1.106)
NETGEAR EX6200 Firmware: before 1.0.1.86 (fixed in 1.0.1.86)
NETGEAR EX6250 Firmware: before 1.0.0.146 (fixed in 1.0.0.146)
NETGEAR EX6400 Firmware: before 1.0.2.164 (fixed in 1.0.2.164)
NETGEAR EX6400V2 Firmware: before 1.0.0.146 (fixed in 1.0.0.146)
NETGEAR EX6410 Firmware: before 1.0.0.146 (fixed in 1.0.0.146)
NETGEAR EX6420 Firmware: before 1.0.0.146 (fixed in 1.0.0.146)
NETGEAR EX6500V1 Firmware: before 1.0.0.146 (fixed in 1.0.0.146)
NETGEAR EX7300 Firmware: before 1.0.2.164 (fixed in 1.0.2.164)
NETGEAR EX7300V2 Firmware: before 1.0.0.146 (fixed in 1.0.0.146)
NETGEAR EX7320 Firmware: before 1.0.0.146 (fixed in 1.0.0.146)
NETGEAR EX7700 Firmware: before 1.0.0.222 (fixed in 1.0.0.222)
NETGEAR EX8000 Firmware: before 1.0.1.238 (fixed in 1.0.1.238)
NETGEAR LBR1020 Firmware: before 2.6.5.32 (fixed in 2.6.5.32)
NETGEAR LBR20 Firmware: before 2.6.5.32 (fixed in 2.6.5.32)
NETGEAR r6700ax Firmware: before 1.0.5.108 (fixed in 1.0.5.108)
NETGEAR r7800 Firmware: before 1.0.2.84 (fixed in 1.0.2.84)
NETGEAR r8900 Firmware: before 1.0.5.36 (fixed in 1.0.5.36)
NETGEAR r9000 Firmware: before 1.0.5.36 (fixed in 1.0.5.36)
NETGEAR RAX10 Firmware: before 1.0.5.108 (fixed in 1.0.5.108)
NETGEAR RAX120 Firmware: before 1.2.2.24 (fixed in 1.2.2.24)
NETGEAR RAX120V2 Firmware: before 1.2.2.24 (fixed in 1.2.2.24)
and 16 more

Published 2024-05-07. Last modified 2026-06-17.