What’s Vulnerable › Vulnerabilities

CVE-2019-20721

• Severity: medium (CVSS 4.8 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-79

Description

Certain NETGEAR devices are affected by stored XSS. This affects D7800 before 1.0.1.47, EX2700 before 1.0.1.48, EX6100v2 before 1.0.1.76, EX6150v2 before 1.0.1.76, EX6200v2 before 1.0.1.72, EX6400 before 1.0.2.136, EX7300 before 1.0.2.136, R7500v2 before 1.0.3.38, R7800 before 1.0.2.52, R8900 before 1.0.4.12, R9000 before 1.0.4.12, WN2000RPTv3 before 1.0.1.32, WN3000RPv2 before 1.0.0.68, WN3000RPv3 before 1.0.2.70, WN3100RPv2 before 1.0.0.66, WNDR4300v2 before 1.0.0.58, WNDR4500v3 before 1.0.0.58, WNR2000v5 before 1.0.0.66, XR450 before 2.3.2.32, and XR500 before 2.3.2.32.

Affected products

• NETGEAR D7800 Firmware: before 1.0.1.47 — fixed in 1.0.1.47
• NETGEAR Ex2700 Firmware: before 1.0.1.48 — fixed in 1.0.1.48
• Netgear EX6100: before 1.0.1.76 — fixed in 1.0.1.76
• Netgear EX6150: before 1.0.1.76 — fixed in 1.0.1.76
• Netgear EX6200: before 1.0.1.72 — fixed in 1.0.1.72
• NETGEAR Ex6400 Firmware: before 1.0.2.136 — fixed in 1.0.2.136
• NETGEAR Ex7300 Firmware: before 1.0.2.136 — fixed in 1.0.2.136
• NETGEAR R7500 Firmware: before 1.0.3.38 — fixed in 1.0.3.38
• NETGEAR R7800 Firmware: before 1.0.2.52 — fixed in 1.0.2.52
• NETGEAR R8900 Firmware: before 1.0.4.12 — fixed in 1.0.4.12
• NETGEAR R9000 Firmware: before 1.0.4.12 — fixed in 1.0.4.12
• NETGEAR Wn2000Rpt Firmware: before 1.0.1.32 — fixed in 1.0.1.32
• NETGEAR Wn3000Rp Firmware: before 1.0.0.68; before 1.0.2.70 — fixed in 1.0.0.68, 1.0.2.70
• NETGEAR Wn3100Rp Firmware: before 1.0.0.66 — fixed in 1.0.0.66
• NETGEAR Wndr4300 Firmware: before 1.0.0.58 — fixed in 1.0.0.58
• Netgear WNDR4500: before 1.0.0.58 — fixed in 1.0.0.58
• NETGEAR Wnr2000 Firmware: before 1.0.0.66 — fixed in 1.0.0.66
• NETGEAR Xr450 Firmware: before 2.3.2.32 — fixed in 2.3.2.32
• NETGEAR Xr500 Firmware: before 2.3.2.32 — fixed in 2.3.2.32

How to fix

Upgrade to a fixed version: NETGEAR D7800 Firmware 1.0.1.47; NETGEAR Ex2700 Firmware 1.0.1.48; Netgear EX6100 1.0.1.76; Netgear EX6150 1.0.1.76; Netgear EX6200 1.0.1.72; NETGEAR Ex6400 Firmware 1.0.2.136; NETGEAR Ex7300 Firmware 1.0.2.136; NETGEAR R7500 Firmware 1.0.3.38; NETGEAR R7800 Firmware 1.0.2.52; NETGEAR R8900 Firmware 1.0.4.12; NETGEAR R9000 Firmware 1.0.4.12; NETGEAR Wn2000Rpt Firmware 1.0.1.32. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000061207/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-Gateways-and-Extenders-PSV-2018-0159
• https://kb.netgear.com/000061207/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-Gateways-and-Extenders-PSV-2018-0159

Get alerted when CVE-2019-20721 or the next vulnerability affects your stack