CVE-2020-17409

Severity: medium (CVSS 6.5 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: 2020-10-13 · updated 2026-06-17
Weakness: CWE-288

Description

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of NETGEAR R6120, R6080, R6260, R6220, R6020, JNR3210, and WNR2020 routers with firmware 1.0.66. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-10754.

Affected products

NETGEAR Jnr3210 Firmware: all versions
NETGEAR R6020 Firmware: before 1.0.0.44 — fixed in 1.0.0.44
NETGEAR R6080 Firmware: before 1.0.0.44 — fixed in 1.0.0.44
NETGEAR R6120 Firmware: before 1.0.0.70 — fixed in 1.0.0.70
NETGEAR R6220 Firmware: before 1.1.0.100 — fixed in 1.1.0.100
NETGEAR R6230 Firmware: before 1.1.0.100 — fixed in 1.1.0.100
NETGEAR R6260: before 1.1.0.76 — fixed in 1.1.0.76
NETGEAR R6330 Firmware: before 1.1.0.76 — fixed in 1.1.0.76
NETGEAR R6350 Firmware: before 1.1.0.76 — fixed in 1.1.0.76
NETGEAR R6850 Firmware: before 1.1.0.76 — fixed in 1.1.0.76
NETGEAR Wnr2020 Firmware: all versions

How to fix

Upgrade to a fixed version: NETGEAR R6020 Firmware 1.0.0.44; NETGEAR R6080 Firmware 1.0.0.44; NETGEAR R6120 Firmware 1.0.0.70; NETGEAR R6220 Firmware 1.1.0.100; NETGEAR R6230 Firmware 1.1.0.100; NETGEAR R6260 1.1.0.76; NETGEAR R6330 Firmware 1.1.0.76; NETGEAR R6350 Firmware 1.1.0.76; NETGEAR R6850 Firmware 1.1.0.76. Check the vendor advisory for mitigations.

References

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