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

published 2020-04-23 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13681

cvss: 6.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects DGN2200Bv4 before 1.0.0.102, DGN2200v4 before 1.0.0.102, EX3700 before 1.0.0.70, EX3800 before 1.0.0.70, EX6000 before 1.0.0.30, EX6100 before 1.0.2.22, EX6120 before 1.0.0.40, EX6130 before 1.0.0.22, EX6150 before 1.0.0.38, EX6200 before 1.0.3.86, EX7000 before 1.0.0.64, R6300v2 before 1.0.4.22, R6900P before 1.3.0.18, R7000P before 1.3.0.18, R7300DST before 1.0.0.62, R7900P before 1.3.0.10, R8000 before 1.0.4.12, R8000P before 1.3.0.10, WN2500RPv2 before 1.0.1.52, and WNDR3400v3 before 1.0.1.18.

Patch / fix

fixed in 20

netgear dgn2200b_firmware 1.0.0.102
netgear dgn2200_firmware 1.0.0.102
netgear ex3700_firmware 1.0.0.70
netgear ex3800_firmware 1.0.0.70
netgear ex6000_firmware 1.0.0.30
netgear ex6100_firmware 1.0.2.22
netgear ex6120_firmware 1.0.0.40
netgear ex6130_firmware 1.0.0.22
netgear ex6150_firmware 1.0.0.38
netgear ex6200_firmware 1.0.3.86
netgear ex7000_firmware 1.0.0.64
netgear r6300_firmware 1.0.4.22
netgear r6900p_firmware 1.3.0.18
netgear r7000p_firmware 1.3.0.18
netgear r7300dst_firmware 1.0.0.62
netgear r7900p_firmware 1.3.0.10
netgear r8000_firmware 1.0.4.12
netgear r8000p_firmware 1.3.0.10
netgear wn2500rp_firmware 1.0.1.52
netgear wndr3400_firmware 1.0.1.18

Exploit prediction

1.08% chance of exploitation in the next 30 days, higher than 65% 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 /000055196/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-Extenders-PSV
vendor-advisory

Sources

CVE List CVE-2018-21163
NVD CVE-2018-21163

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