What’s Vulnerable › Vulnerabilities

CVE-2018-21114

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-22 · updated 2026-06-17
• Weakness: CWE-74

Description

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects D7800 before 1.0.1.44, EX6150v2 before 1.0.1.70, EX6100v2 before 1.0.1.70, EX6200v2 before 1.0.1.64, EX7300 before 1.0.2.136, EX6400 before 1.0.2.136, R6100 before 1.0.1.16, R7500 before 1.0.0.110, R7800 before 1.0.2.32, R9000 before 1.0.4.12, WN3000RPv2 before 1.0.0.56, WN3000RPv3 before 1.0.2.52, WNDR4300v2 before 1.0.0.50, and WNDR4500v3 before 1.0.0.50.

Affected products

• NETGEAR D7800 Firmware: before 1.0.1.44 — fixed in 1.0.1.44
• Netgear EX6100: before 1.0.1.70 — fixed in 1.0.1.70
• Netgear EX6150: before 1.0.1.70 — fixed in 1.0.1.70
• Netgear EX6200: before 1.0.1.64 — fixed in 1.0.1.64
• NETGEAR Ex6400 Firmware: before 1.0.2.136 — fixed in 1.0.2.136
• NETGEAR Ex7300 Firmware: before 1.0.2.136 — fixed in 1.0.2.136
• NETGEAR R6100 Firmware: before 1.0.1.16 — fixed in 1.0.1.16
• NETGEAR R7500 Firmware: before 1.0.0.110 — fixed in 1.0.0.110
• NETGEAR R7800 Firmware: before 1.0.2.32 — fixed in 1.0.2.32
• NETGEAR R9000 Firmware: before 1.0.4.12 — fixed in 1.0.4.12
• NETGEAR Wn3000Rp Firmware: before 1.0.0.56; before 1.0.2.52 — fixed in 1.0.0.56, 1.0.2.52
• NETGEAR Wndr4300 Firmware: before 1.0.0.50 — fixed in 1.0.0.50
• Netgear WNDR4500: before 1.0.0.50 — fixed in 1.0.0.50

How to fix

Upgrade to a fixed version: NETGEAR D7800 Firmware 1.0.1.44; Netgear EX6100 1.0.1.70; Netgear EX6150 1.0.1.70; Netgear EX6200 1.0.1.64; NETGEAR Ex6400 Firmware 1.0.2.136; NETGEAR Ex7300 Firmware 1.0.2.136; NETGEAR R6100 Firmware 1.0.1.16; NETGEAR R7500 Firmware 1.0.0.110; NETGEAR R7800 Firmware 1.0.2.32; NETGEAR R9000 Firmware 1.0.4.12; NETGEAR Wn3000Rp Firmware 1.0.0.56, 1.0.2.52; NETGEAR Wndr4300 Firmware 1.0.0.50. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000060437/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-Modem-Routers-and-Wireless-Extenders-PSV-2017-0645
• https://kb.netgear.com/000060437/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-Modem-Routers-and-Wireless-Extenders-PSV-2017-0645

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