Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user.

published 2020-04-28 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13699

cvss: 6.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects D7800 before 1.0.1.28, EX2700 before 1.0.1.32, EX6200v2 before 1.0.1.56, R7500v2 before 1.0.3.24, R7800 before 1.0.2.40, R9000 before 1.0.3.6, WN2000RPTv3 before 1.0.1.20, WN3000RPv3 before 1.0.2.52, WN3100RPv2 before 1.0.0.42, WNDR3700v4 before 1.0.2.92, WNDR4300 before 1.0.2.94, WNDR4300v2 before 1.0.0.50, WNDR4500v3 before 1.0.0.50, and WNR2000v5 before 1.0.0.62.

Patch / fix

fixed in 13

netgear d7800_firmware 1.0.1.28
netgear ex2700_firmware 1.0.1.32
netgear ex6200_firmware 1.0.1.56
netgear r7500_firmware 1.0.3.24
netgear r7800_firmware 1.0.2.40
netgear r9000_firmware 1.0.3.6
netgear wn2000rpt_firmware 1.0.1.20
netgear wn3000rp_firmware 1.0.2.52
netgear wn3100rp_firmware 1.0.0.42
netgear wndr3700_firmware 1.0.2.92
netgear wndr4300_firmware 1.0.0.50, 1.0.2.94
netgear wndr4500_firmware 1.0.0.50
netgear wnr2000_firmware 1.0.0.62

Exploit prediction

1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	6.8	CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA	3.0	6.8	CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness

CWE-787 Out-of-bounds Write

References

kb.netgear.com /000055177/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-Extenders-PSV
vendor-advisory

Sources

CVE List CVE-2018-21181
NVD CVE-2018-21181

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