Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.

published 2020-04-23 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13680

cvss: 8.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 3.4%; EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects D6400 before 1.0.0.78, EX6200 before 1.0.3.86, EX7000 before 1.0.0.64, R6250 before 1.0.4.8, R6300v2 before 1.0.4.6, R6400 before 1.0.1.12, R6700 before 1.0.1.16, R7000 before 1.0.7.10, R7100LG before 1.0.0.42, R7300DST before 1.0.0.44, R7900 before 1.0.1.12, R8000 before 1.0.3.36, R8300 before 1.0.2.74, R8500 before 1.0.2.74, WNDR3400v3 before 1.0.1.14, and WNR3500Lv2 before 1.2.0.48.

Patch / fix

fixed in 16

netgear d6400_firmware 1.0.0.78
netgear ex6200_firmware 1.0.3.86
netgear ex7000_firmware 1.0.0.64
netgear r6250_firmware 1.0.4.8
netgear r6300_firmware 1.0.4.6
netgear r6400_firmware 1.0.1.12
netgear r6700_firmware 1.0.1.16
netgear r7000_firmware 1.0.7.10
netgear r7100lg_firmware 1.0.0.42
netgear r7300dst_firmware 1.0.0.44
netgear r7900_firmware 1.0.1.12
netgear r8000_firmware 1.0.3.36
netgear r8300_firmware 1.0.2.74
netgear r8500_firmware 1.0.2.74
netgear wndr3400_firmware 1.0.1.14
netgear wnr3500l_firmware 1.2.0.48

Exploit prediction

3.44% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	8.8	CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.0	8.8	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

kb.netgear.com /000059147/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Gateways-Routers-and-Extenders-P
vendor-advisory

Sources

CVE List CVE-2018-21162
NVD CVE-2018-21162

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary