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

published 2020-04-27 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13671

cvss: 8.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D7800 before 1.0.1.34, DM200 before 1.0.0.50, EX2700 before 1.0.1.32, EX6100v2 before 1.0.1.70, EX6150v2 before 1.0.1.70, EX6200v2 before 1.0.1.62, EX6400 before 1.0.1.78, EX7300 before 1.0.1.62, EX8000 before 1.0.0.114, R6100 before 1.0.1.22, R7500 before 1.0.0.122, R7500v2 before 1.0.3.26, R7800 before 1.0.2.40, R8900 before 1.0.3.10, R9000 before 1.0.3.10, WN2000RPTv3 before 1.0.1.26, WN3000RPv2 before 1.0.0.56, WN3000RPv3 before 1.0.2.66, WN3100RPv2 before 1.0.0.56, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.54, WNDR4500v3 before 1.0.0.54, and WNR2000v5 before 1.0.0.64.

Patch / fix

fixed in 20

netgear d7800_firmware 1.0.1.34
netgear dm200_firmware 1.0.0.50
netgear ex2700_firmware 1.0.1.32
netgear ex6100_firmware 1.0.1.70
netgear ex6150_firmware 1.0.1.70
netgear ex6200_firmware 1.0.1.62
netgear ex6400_firmware 1.0.1.78
netgear ex7300_firmware 1.0.1.62
netgear ex8000_firmware 1.0.0.114
netgear r6100_firmware 1.0.1.22
netgear r7500_firmware 1.0.0.122, 1.0.3.26
netgear r7800_firmware 1.0.2.40
netgear r8900_firmware 1.0.3.10
netgear r9000_firmware 1.0.3.10
netgear wn2000rpt_firmware 1.0.1.26
netgear wn3000rp_firmware 1.0.0.56, 1.0.2.66
netgear wn3100rp_firmware 1.0.0.56
netgear wndr4300_firmware 1.0.0.54, 1.0.2.98
netgear wndr4500_firmware 1.0.0.54
netgear wnr2000_firmware 1.0.0.64

Exploit prediction

1.58% chance of exploitation in the next 30 days, higher than 75% 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-120 Buffer Copy without Checking Size of Input

References

kb.netgear.com /000059480/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Gateways-Routers-and-Extenders-PSV
vendor-advisory

Sources

CVE List CVE-2018-21153
NVD CVE-2018-21153

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