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Vulnerability record · CVE-2017-18756 · published 22 April 2020

CVE-2017-18756: Netgear d6220 firmware vulnerability

Netgear · D6220 Firmware

Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects D6220 before 1.0.0.32, D6400 before 1.0.0.66, D8500 before 1.0.3.35, DGN2200Bv4 before 1.0.0.94, DGN2200v4 before 1.0.0.94, R6250 before 1.0.4.14, R6300v2 before 1.0.4.18, R6400 before 1.01.32, R6400v2 before 1.0.2.44, R6700 before 1.0.1.36, R6900 before 1.0.1.30, R6900P before 1.3.0.8, R7000 before 1.0.9.14, R7000P before 1.3.0.8, R7100LG before 1.0.0.34, R7900 before 1.0.2.4, R8000 before 1.0.4.2, WN2500RPv2 before 1.0.1.50, WNDR3400v3 before 1.0.1.14, and WNDR4000 before 1.0.2.10.

8.8 CVSS 3.1 High EPSS 0.55% · top 56.5%
8.8CVSS 3.1 base score, v2 5.8
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
19Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects D6220 before 1.0.0.32, D6400 before 1.0.0.66, D8500 before 1.0.3.35, DGN2200Bv4 before 1.0.0.94, DGN2200v4 before 1.0.0.94, R6250 before 1.0.4.14, R6300v2 before 1.0.4.18, R6400 before 1.01.32, R6400v2 before 1.0.2.44, R6700 before 1.0.1.36, R6900 before 1.0.1.30, R6900P before 1.3.0.8, R7000 before 1.0.9.14, R7000P before 1.3.0.8, R7100LG before 1.0.0.34, R7900 before 1.0.2.4, R8000 before 1.0.4.2, WN2500RPv2 before 1.0.1.50, WNDR3400v3 before 1.0.1.14, and WNDR4000 before 1.0.2.10.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

19 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://kb.netgear.com/000051492/Security-Advisory-for-Security-Misconfiguration-on-Some-Routers-Gateways-and-Extenders- Vendor Advisory
https://kb.netgear.com/000051492/Security-Advisory-for-Security-Misconfiguration-on-Some-Routers-Gateways-and-Extenders- Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-6077NETGEAR DGN2200 ping.cgi OS Command InjectionThe ping.cgi endpoint on NETGEAR DGN2200 devices with firmware through 10.0.0.50 fails to sanitize the ping_IPAddr field of an HTTP POST request, all…KEVEPSS 69%analysed8.8CVE-2016-6277NETGEAR router cgi-bin command injection allows remote code executionMultiple NETGEAR router models fail to sanitize shell metacharacters in the path info passed to cgi-bin/, allowing remote command execution. The flaw…KEVEPSS 100%analysed8.1CVE-2017-5521NETGEAR router web management password disclosure via recovery tokenMultiple NETGEAR router models expose the admin password through the web management server. When authentication is canceled and password recovery is …KEVEPSS 89%analysed9.8CVE-2021-45638Netgear d6220 firmware out-of-bounds write vulnerabilityCertain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects D6220 before 1.0.0.68, D6400 befor…EPSS 1.5%9.8CVE-2021-45610Netgear d6220 firmware classic buffer overflow vulnerabilityCertain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D6220 before 1.0.0.66, D6400 before 1.0.0.100,…EPSS 1.4%9.8CVE-2021-45609Netgear d8500 firmware classic buffer overflow vulnerabilityCertain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D8500 before 1.0.3.58, R6250 before 1.0.4.48, …EPSS 1.2%9.8CVE-2021-45624Netgear d7000v2 firmware command injection vulnerabilityCertain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects D7000v2 before 1.0.0.66, D8500 before 1.0.3.58…EPSS 1.7%9.8CVE-2021-45527Netgear rbk752 firmware classic buffer overflow vulnerabilityCertain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects D6220 before 1.0.0.68, D6400 before 1.0.0.102, D7000…EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2017-18756), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.