CVE-2018-21213

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-28 · updated 2026-06-17
Weakness: CWE-120

Description

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D3600 before 1.0.0.67, D6000 before 1.0.0.67, D7800 before 1.0.1.30, R6100 before 1.0.1.20, R7500 before 1.0.0.118, R7500v2 before 1.0.3.24, R7800 before 1.0.2.40, R9000 before 1.0.2.52, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.50, and WNDR4500v3 before 1.0.0.50.

Affected products

NETGEAR D3600 Firmware: before 1.0.0.67 — fixed in 1.0.0.67
NETGEAR D6000 Firmware: before 1.0.0.67 — fixed in 1.0.0.67
NETGEAR D7800 Firmware: before 1.0.1.30 — fixed in 1.0.1.30
NETGEAR R6100 Firmware: before 1.0.1.20 — fixed in 1.0.1.20
NETGEAR R7500 Firmware: before 1.0.0.118; before 1.0.3.24 — fixed in 1.0.0.118, 1.0.3.24
NETGEAR R7800 Firmware: before 1.0.2.40 — fixed in 1.0.2.40
NETGEAR R9000 Firmware: before 1.0.2.52 — fixed in 1.0.2.52
NETGEAR Wndr3700 Firmware: before 1.0.2.96 — fixed in 1.0.2.96
NETGEAR Wndr4300 Firmware: before 1.0.2.98; before 1.0.0.50 — fixed in 1.0.0.50, 1.0.2.98
Netgear WNDR4500: before 1.0.0.50 — fixed in 1.0.0.50

How to fix

Upgrade to a fixed version: NETGEAR D3600 Firmware 1.0.0.67; NETGEAR D6000 Firmware 1.0.0.67; NETGEAR D7800 Firmware 1.0.1.30; NETGEAR R6100 Firmware 1.0.1.20; NETGEAR R7500 Firmware 1.0.0.118, 1.0.3.24; NETGEAR R7800 Firmware 1.0.2.40; NETGEAR R9000 Firmware 1.0.2.52; NETGEAR Wndr3700 Firmware 1.0.2.96; NETGEAR Wndr4300 Firmware 1.0.0.50, 1.0.2.98; Netgear WNDR4500 1.0.0.50. Check the vendor advisory for mitigations.

References

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