What’s Vulnerable › Vulnerabilities

CVE-2018-21162

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-23 · updated 2026-06-17
• Weakness: CWE-78

Description

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects D6400 before 1.0.0.78, EX6200 before 1.0.3.86, EX7000 before 1.0.0.64, R6250 before 1.0.4.8, R6300v2 before 1.0.4.6, R6400 before 1.0.1.12, R6700 before 1.0.1.16, R7000 before 1.0.7.10, R7100LG before 1.0.0.42, R7300DST before 1.0.0.44, R7900 before 1.0.1.12, R8000 before 1.0.3.36, R8300 before 1.0.2.74, R8500 before 1.0.2.74, WNDR3400v3 before 1.0.1.14, and WNR3500Lv2 before 1.2.0.48.

Affected products

• Netgear D6400: before 1.0.0.78 — fixed in 1.0.0.78
• Netgear EX6200: before 1.0.3.86 — fixed in 1.0.3.86
• NETGEAR Ex7000 Firmware: before 1.0.0.64 — fixed in 1.0.0.64
• NETGEAR R6250 Firmware: before 1.0.4.8 — fixed in 1.0.4.8
• NETGEAR R6300 Firmware: before 1.0.4.6 — fixed in 1.0.4.6
• NETGEAR R6400 Firmware: before 1.0.1.12 — fixed in 1.0.1.12
• NETGEAR R6700: before 1.0.1.16 — fixed in 1.0.1.16
• NETGEAR R7000: before 1.0.7.10 — fixed in 1.0.7.10
• NETGEAR R7100Lg Firmware: before 1.0.0.42 — fixed in 1.0.0.42
• NETGEAR R7300Dst Firmware: before 1.0.0.44 — fixed in 1.0.0.44
• NETGEAR R7900 Firmware: before 1.0.1.12 — fixed in 1.0.1.12
• NETGEAR R8000 Firmware: before 1.0.3.36 — fixed in 1.0.3.36
• NETGEAR R8300 Firmware: before 1.0.2.74 — fixed in 1.0.2.74
• NETGEAR R8500 Firmware: before 1.0.2.74 — fixed in 1.0.2.74
• NETGEAR Wndr3400 Firmware: before 1.0.1.14 — fixed in 1.0.1.14
• NETGEAR Wnr3500L Firmware: before 1.2.0.48 — fixed in 1.2.0.48

How to fix

Upgrade to a fixed version: Netgear D6400 1.0.0.78; Netgear EX6200 1.0.3.86; NETGEAR Ex7000 Firmware 1.0.0.64; NETGEAR R6250 Firmware 1.0.4.8; NETGEAR R6300 Firmware 1.0.4.6; NETGEAR R6400 Firmware 1.0.1.12; NETGEAR R6700 1.0.1.16; NETGEAR R7000 1.0.7.10; NETGEAR R7100Lg Firmware 1.0.0.42; NETGEAR R7300Dst Firmware 1.0.0.44; NETGEAR R7900 Firmware 1.0.1.12; NETGEAR R8000 Firmware 1.0.3.36. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000059147/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Gateways-Routers-and-Extenders-PSV-2016-0074
• https://kb.netgear.com/000059147/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Gateways-Routers-and-Extenders-PSV-2016-0074

Get alerted when CVE-2018-21162 or the next vulnerability affects your stack