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CVE-2018-21141

18
FAUCET Score

CVE-2018-21141 describes a denial-of-service vulnerability affecting several NETGEAR router models, including the R6100, R7500, R7800, R8900, R9000, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5, prior to specified firmware versions. This vulnerability has a CVSS score of 4.5 (Medium), indicating it can be exploited by a high-privileged attacker on an adjacent network to cause a denial of service. There is currently no evidence of active exploitation, and no public exploit code or Metasploit/Nuclei modules are available. Community discussion and media coverage for this CVE are minimal.

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
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 28th percentile among its peer group of 399 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 / 000059492/Security-Advisory-for-Denial-of-Service-on-Some-Routers-PSV-2017-3168
Vendor Advisory