What’s Vulnerable › Vulnerabilities

CVE-2019-20740

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-16 · updated 2026-06-17
• Weakness: CWE-787

Description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects DGN2200v4 before 1.0.0.110, DGND2200Bv4 before 1.0.0.109, R7300 before 1.0.0.70, R8300 before 1.0.2.130, and R8500 before 1.0.2.130.

Affected products

• NETGEAR Dgn2200 Firmware: before 1.0.0.110 — fixed in 1.0.0.110
• NETGEAR Dgnd2200B Firmware: before 1.0.0.109 — fixed in 1.0.0.109
• NETGEAR R7300 Firmware: before 1.0.0.70 — fixed in 1.0.0.70
• NETGEAR R8300 Firmware: before 1.0.2.130 — fixed in 1.0.2.130
• NETGEAR R8500 Firmware: before 1.0.2.130 — fixed in 1.0.2.130

How to fix

Upgrade to a fixed version: NETGEAR Dgn2200 Firmware 1.0.0.110; NETGEAR Dgnd2200B Firmware 1.0.0.109; NETGEAR R7300 Firmware 1.0.0.70; NETGEAR R8300 Firmware 1.0.2.130; NETGEAR R8500 Firmware 1.0.2.130. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000060976/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2018-0258
• https://kb.netgear.com/000060976/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2018-0258

Get alerted when CVE-2019-20740 or the next vulnerability affects your stack