What’s Vulnerable › Vulnerabilities

CVE-2019-20736

• 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 D6000 before 1.0.0.72, D6100 before 1.0.0.63, R7800 before 1.0.2.52, R8900 before 1.0.4.2, R9000 before 1.0.4.2, WNDR3700v4 before 1.0.2.102, WNDR4300v1 before 1.0.2.104, WNDR4300v2 before 1.0.0.58, WNDR4500v3 before 1.0.0.58, WNR2000v5 before 1.0.0.68, and XR500 before 2.3.2.32.

Affected products

• NETGEAR D6000 Firmware: before 1.0.0.72 — fixed in 1.0.0.72
• NETGEAR D6100 Firmware: before 1.0.0.63 — fixed in 1.0.0.63
• NETGEAR R7800 Firmware: before 1.0.2.52 — fixed in 1.0.2.52
• NETGEAR R8900 Firmware: before 1.0.4.2 — fixed in 1.0.4.2
• NETGEAR R9000 Firmware: before 1.0.4.2 — fixed in 1.0.4.2
• NETGEAR Wndr3700 Firmware: before 1.0.2.102 — fixed in 1.0.2.102
• NETGEAR Wndr4300 Firmware: before 1.0.2.104; before 1.0.0.58 — fixed in 1.0.0.58, 1.0.2.104
• Netgear WNDR4500: before 1.0.0.58 — fixed in 1.0.0.58
• NETGEAR Wnr2000 Firmware: before 1.0.0.68 — fixed in 1.0.0.68
• NETGEAR Xr500 Firmware: before 2.3.2.32 — fixed in 2.3.2.32

How to fix

Upgrade to a fixed version: NETGEAR D6000 Firmware 1.0.0.72; NETGEAR D6100 Firmware 1.0.0.63; NETGEAR R7800 Firmware 1.0.2.52; NETGEAR R8900 Firmware 1.0.4.2; NETGEAR R9000 Firmware 1.0.4.2; NETGEAR Wndr3700 Firmware 1.0.2.102; NETGEAR Wndr4300 Firmware 1.0.0.58, 1.0.2.104; Netgear WNDR4500 1.0.0.58; NETGEAR Wnr2000 Firmware 1.0.0.68; NETGEAR Xr500 Firmware 2.3.2.32. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000061190/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2018-0133
• https://kb.netgear.com/000061190/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2018-0133

Get alerted when CVE-2019-20736 or the next vulnerability affects your stack