CVE-2021-34982: NETGEAR d6220 Firmware

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. When parsing the strings file, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13709.

Affected products

NETGEAR d6220 Firmware: before 1.0.0.76 (fixed in 1.0.0.76)
NETGEAR d6400 Firmware: before 1.0.0.108 (fixed in 1.0.0.108)
NETGEAR d7000v2 Firmware: before 1.0.0.76 (fixed in 1.0.0.76)
NETGEAR DC112A Firmware: before 1.0.0.62 (fixed in 1.0.0.62)
NETGEAR DGN2200V4 Firmware: before 1.0.0.126 (fixed in 1.0.0.126)
NETGEAR EX3700 Firmware: before 1.0.0.94 (fixed in 1.0.0.94)
NETGEAR EX3800 Firmware: before 1.0.0.94 (fixed in 1.0.0.94)
NETGEAR EX6120 Firmware: before 1.0.0.66 (fixed in 1.0.0.66)
NETGEAR EX6130 Firmware: before 1.0.0.46 (fixed in 1.0.0.46)
NETGEAR EX7000 Firmware: before 1.0.1.106 (fixed in 1.0.1.106)
NETGEAR EX7500 Firmware: before 1.0.1.76 (fixed in 1.0.1.76)
NETGEAR LAX20 Firmware: before 1.1.6.30 (fixed in 1.1.6.30)
NETGEAR MR60 Firmware: before 1.1.6.122 (fixed in 1.1.6.122)
NETGEAR MR80 Firmware: before 1.1.6.10 (fixed in 1.1.6.10)
NETGEAR MS60 Firmware: before 1.1.6.122 (fixed in 1.1.6.122)
NETGEAR MS80 Firmware: before 1.1.6.10 (fixed in 1.1.6.10)
NETGEAR r6400 Firmware: before 1.0.1.76 (fixed in 1.0.1.76)
NETGEAR r6400v2 Firmware: before 1.0.4.120 (fixed in 1.0.4.120)
NETGEAR r6700v3 Firmware: before 1.0.4.120 (fixed in 1.0.4.120)
NETGEAR r6900p Firmware: before 1.3.3.148 (fixed in 1.3.3.148)
NETGEAR r7000 Firmware: before 1.0.11.128 (fixed in 1.0.11.128)
NETGEAR r7000p Firmware: before 1.3.3.148 (fixed in 1.3.3.148)
NETGEAR r7100lg Firmware: before 1.0.0.72 (fixed in 1.0.0.72)
NETGEAR r7850 Firmware: before 1.0.5.76 (fixed in 1.0.5.76)
NETGEAR r7900p Firmware: before 1.4.2.84 (fixed in 1.4.2.84)
and 27 more

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