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CVE-2018-21142

18
FAUCET Score

CVE-2018-21142 describes a denial-of-service vulnerability affecting multiple NETGEAR router models, including the R6100, R7500, R7800, R8900, R9000, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5, prior to specific firmware versions. The vulnerability has a CVSS score of 4.9 (Medium), indicating that an attacker with high privileges can exploit it over the network with low attack complexity to cause a denial of service. There is currently no evidence of active exploitation, public exploit code (e.g., Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.1.22CPE matchmatch criteria
cpe:2.3:o:netgear:r6100_firmware:*:*:*:*:*:*:*:*
< 1.0.0.122CPE matchmatch criteria
cpe:2.3:o:netgear:r7500_firmware:*:*:*:*:*:*:*:*
< 1.0.2.42CPE matchmatch criteria
cpe:2.3:o:netgear:r7800_firmware:*:*:*:*:*:*:*:*
< 1.0.3.10CPE matchmatch criteria
cpe:2.3:o:netgear:r8900_firmware:*:*:*:*:*:*:*:*
< 1.0.3.10CPE matchmatch criteria
cpe:2.3:o:netgear:r9000_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.5MEDIUM

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.13%
Probability of exploitation in next 30 days
EPSS Percentile
63.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 69th percentile among its peer group of 3,566 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

kb.netgear.com / 000059491/Security-Advisory-for-Denial-of-Service-on-Some-Routers-PSV-2017-3169
Vendor Advisory