What’s Vulnerable › Vulnerabilities

CVE-2019-20747

• 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 D6100 before 1.0.0.58, D7800 before 1.0.1.40, R7500v2 before 1.0.3.34, R7800 before 1.0.2.52, R8900 before 1.0.4.2, R9000 before 1.0.3.16, RAX120 before 1.0.0.74, RBK20 before 2.3.0.22, RBR20 before 2.3.0.22, RBS20 before 2.3.0.22, RBK50 before 2.3.0.22, RBR50 before 2.3.0.22, RBS50 before 2.3.0.22, RBK40 before 2.3.0.22, RBS40 before 2.3.0.22, SRK60 before 2.2.0.64, SRR60 before 2.2.0.64, SRS60 before 2.2.0.64, WNDR3700v4 before 1.0.2.102, WNDR4300 before 1.0.2.104, WNDR4300v2 before 1.0.0.56, WNDR4500v3 before 1.0.0.56, and WNR2000v5 before 1.0.0.66.

Affected products

• NETGEAR D6100 Firmware: before 1.0.0.58 — fixed in 1.0.0.58
• NETGEAR D7800 Firmware: before 1.0.1.40 — fixed in 1.0.1.40
• NETGEAR R7500 Firmware: before 1.0.3.34 — fixed in 1.0.3.34
• 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 1.0.3.16 — fixed in 1.0.3.16
• NETGEAR Rax120 Firmware: before 1.0.0.74 — fixed in 1.0.0.74
• NETGEAR Rbk20 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Rbk40 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Rbk50 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Rbr20 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Rbr50 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Rbs20 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Rbs40 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Rbs50 Firmware: before 2.3.0.22 — fixed in 2.3.0.22
• NETGEAR Srk60 Firmware: before 2.2.0.64 — fixed in 2.2.0.64
• NETGEAR Srr60 Firmware: before 2.2.0.64 — fixed in 2.2.0.64
• NETGEAR Srs60 Firmware: before 2.2.0.64 — fixed in 2.2.0.64
• NETGEAR Wndr3700 Firmware: before 1.0.2.102 — fixed in 1.0.2.102
• NETGEAR Wndr4300 Firmware: before 1.0.2.104; before 1.0.0.56 — fixed in 1.0.0.56, 1.0.2.104
• Netgear WNDR4500: before 1.0.0.56 — fixed in 1.0.0.56
• NETGEAR Wnr2000 Firmware: before 1.0.0.66 — fixed in 1.0.0.66

How to fix

Upgrade to a fixed version: NETGEAR D6100 Firmware 1.0.0.58; NETGEAR D7800 Firmware 1.0.1.40; NETGEAR R7500 Firmware 1.0.3.34; NETGEAR R7800 Firmware 1.0.2.52; NETGEAR R8900 Firmware 1.0.4.2; NETGEAR R9000 Firmware 1.0.3.16; NETGEAR Rax120 Firmware 1.0.0.74; NETGEAR Rbk20 Firmware 2.3.0.22; NETGEAR Rbk40 Firmware 2.3.0.22; NETGEAR Rbk50 Firmware 2.3.0.22; NETGEAR Rbr20 Firmware 2.3.0.22; NETGEAR Rbr50 Firmware 2.3.0.22. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000060962/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-WiFi-Systems-PSV-2018-0032
• https://kb.netgear.com/000060962/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-WiFi-Systems-PSV-2018-0032

Get alerted when CVE-2019-20747 or the next vulnerability affects your stack