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CVE-2018-21227

22
FAUCET Score

CVE-2018-21227 describes a command injection vulnerability in several NETGEAR router models, including the D7800, R6400v2, and R7000, among others, that allows an authenticated user to execute arbitrary commands. This vulnerability carries a CVSS v3.1 score of 6.8 (Medium), indicating that an attacker with high privileges on the adjacent network could achieve high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code (e.g., Metasploit, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.1.34CPE matchmatch criteria
cpe:2.3:o:netgear:d7800_firmware:*:*:*:*:*:*:*:*
< 1.0.2.34CPE matchmatch criteria
cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
< 1.0.1.30CPE matchmatch criteria
cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*
< 1.0.1.30CPE matchmatch criteria
cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*
< 1.0.0.62CPE matchmatch criteria
cpe:2.3:o:netgear:r6900p_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.8MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0085 is in the 74th 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 / 000055109/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-Gateways-PSV-2017-0737
Vendor Advisory