What’s Vulnerable › Vulnerabilities

CVE-2018-21208

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% 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-74

Description

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects D6100 before 1.0.0.57, R6100 before 1.0.1.20, R7500v2 before 1.0.3.24, WNDR4300v2 before 1.0.0.50, and WNDR4500v3 before 1.0.0.50.

Affected products

• NETGEAR D6100 Firmware: before 1.0.0.57 — fixed in 1.0.0.57
• NETGEAR R6100 Firmware: before 1.0.1.20 — fixed in 1.0.1.20
• NETGEAR R7500 Firmware: before 1.0.3.24 — fixed in 1.0.3.24
• 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 D6100 Firmware 1.0.0.57; NETGEAR R6100 Firmware 1.0.1.20; NETGEAR R7500 Firmware 1.0.3.24; NETGEAR Wndr4300 Firmware 1.0.0.50; Netgear WNDR4500 1.0.0.50. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000055141/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-and-Gateways-PSV-2017-2516
• https://kb.netgear.com/000055141/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-and-Gateways-PSV-2017-2516

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