What’s Vulnerable › Vulnerabilities

CVE-2018-21216

• 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, D6100 before 1.0.0.56, and R6100 before 1.0.1.20.

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 D6100 Firmware: before 1.0.0.56 — fixed in 1.0.0.56
• NETGEAR R6100 Firmware: before 1.0.1.20 — fixed in 1.0.1.20

How to fix

Upgrade to a fixed version: NETGEAR D3600 Firmware 1.0.0.67; NETGEAR D6000 Firmware 1.0.0.67; NETGEAR D6100 Firmware 1.0.0.56; NETGEAR R6100 Firmware 1.0.1.20. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000055121/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-and-Gateways-PSV-2017-2485
• https://kb.netgear.com/000055121/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-and-Gateways-PSV-2017-2485

Get alerted when CVE-2018-21216 or the next vulnerability affects your stack