Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker.

published 2020-04-28 6y ago modified 2026-06-17 4mo ago also EUVD-2018-13737

cvss: 8.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D3600 before 1.0.0.67, D6000 before 1.0.0.67, D6100 before 1.0.0.56, D7800 before 1.0.1.30, R6100 before 1.0.1.20, R7500 before 1.0.0.118, R7500v2 before 1.0.3.24, R9000 before 1.0.2.52, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.50, WNDR4500v3 before 1.0.0.50, and WNR2000v5 before 1.0.0.62.

Patch / fix

fixed in 11

netgear wnr2000_firmware 1.0.0.62
netgear r9000_firmware 1.0.2.52
netgear wndr3700_firmware 1.0.2.96
netgear wndr4300_firmware 1.0.0.50, 1.0.2.98
netgear r7500_firmware 1.0.0.118, 1.0.3.24
netgear wndr4500_firmware 1.0.0.50
netgear r6100_firmware 1.0.1.20
netgear d7800_firmware 1.0.1.30
netgear d6000_firmware 1.0.0.67
netgear d3600_firmware 1.0.0.67
netgear d6100_firmware 1.0.0.56

Is CVE-2018-21219 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-09).

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	8.8	CVSS:3.1/AV:A/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	5.8	AV:A/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

kb.netgear.com /000055118/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-and-Gateways-PSV-2017-2482
vendor-advisory

Sources

CVE List CVE-2018-21219
NVD CVE-2018-21219

Fencer Intel 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.