Certain NETGEAR devices are affected by denial of service.

published 2020-04-20 6 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9931

cvss: 6.2; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

Certain NETGEAR devices are affected by denial of service. This affects M4300-28G before 12.0.2.15, M4300-52G before 12.0.2.15, M4300-28G-POE+ before 12.0.2.15, M4300-52G-POE+ before 12.0.2.15, M4300-8X8F before 12.0.2.15, M4300-12X12F before 12.0.2.15, M4300-24X24F before 12.0.2.15, M4300-24X before 12.0.2.15, M4300-48X before 12.0.2.15, and M4200 before 12.0.2.15.

Patch / fix

fixed in 10

netgear m4300-28g_firmware 12.0.2.15
netgear m4300-52g_firmware 12.0.2.15
netgear m4300-28g-poe+_firmware 12.0.2.15
netgear m4300-52g-poe+_firmware 12.0.2.15
netgear m4300-8x8f_firmware 12.0.2.15
netgear m4300-12x12f_firmware 12.0.2.15
netgear m4300-24x24f_firmware 12.0.2.15
netgear m4300-24x_firmware 12.0.2.15
netgear m4300-48x_firmware 12.0.2.15
netgear m4200_firmware 12.0.2.15

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	6.2	CVSS:3.0/AC:L/AV:L/A:H/C:N/I:N/PR:N/S:U/UI:N
NVD	3.1	6.2	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.0	6.2	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-20 Improper Input Validation

References

kb.netgear.com /000049022/Security-Advisory-for-Denial-of-Service-Vulnerability-on-Some-Fully-Managed-Switches-PSV-2017-2005
vendor-advisory

Sources

CVE List CVE-2017-18840
NVD CVE-2017-18840

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