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

published 2020-04-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-11273

cvss: 8.2; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D6220 before 1.0.0.40, D8500 before 1.0.3.39, 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, EX6150v1 before 1.0.0.42, EX6200 before 1.0.3.88, EX7000 before 1.0.0.66, R6300v2 before 1.0.4.18, R6400 before 1.0.1.24, R6400v2 before 1.0.2.32, R6700 before 1.0.1.22, R6700v3 before 1.0.2.32, R6900 before 1.0.1.22, R7000 before 1.0.9.6, R6900P before 1.0.0.56, R7000P before 1.0.0.56, R7100LG before 1.0.0.42, R7300DST before 1.0.0.54, R7900 before 1.0.1.26, R8300 before 1.0.2.106, R8500 before 1.0.2.106, WN2500RPv2 before 1.0.1.54, and WNR3500Lv2 before 1.2.0.46. NOTE: this may be a result of an incomplete fix for CVE-2017-18864.

Patch / fix

fixed in 20

netgear d6220_firmware 1.0.0.40
netgear d8500_firmware 1.0.3.39
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 1.0.0.42
netgear ex6200_firmware 1.0.3.88
netgear ex7000_firmware 1.0.0.66
netgear r6300_firmware 1.0.4.18
netgear r6400_firmware 1.0.1.24, 1.0.2.32
netgear r6700_firmware 1.0.1.22, 1.0.2.32
netgear r6900_firmware 1.0.1.22
netgear r7000_firmware 1.0.9.6
netgear r6900p_firmware 1.0.0.56
netgear r7000p_firmware 1.0.0.56
netgear r7100lg_firmware 1.0.0.42
netgear r7300dst_firmware 1.0.0.54

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	8.2	CVSS:3.0/AC:H/AV:A/A:L/C:H/I:H/PR:N/S:C/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	8.2	CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
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 /000061192/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-Gateways-and-Extenders-PSV
vendor-advisory

Sources

CVE List CVE-2019-20734
NVD CVE-2019-20734

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