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CVE-2018-21162

30
FAUCET Score

CVE-2018-21162 describes a critical command injection vulnerability affecting numerous NETGEAR router and extender models, allowing unauthenticated attackers to execute arbitrary commands. With a CVSS score of 9.8, this flaw presents a severe risk due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While no public exploits or active exploitation have been identified, and community discussion is minimal, the high FAUCET Risk Score of 78/100 indicates a significant underlying risk. Organizations using affected NETGEAR devices should prioritize patching to mitigate this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.0.78CPE matchmatch criteria
cpe:2.3:o:netgear:d6400_firmware:*:*:*:*:*:*:*:*
< 1.0.3.86CPE matchmatch criteria
cpe:2.3:o:netgear:ex6200_firmware:*:*:*:*:*:*:*:*
< 1.0.0.64CPE matchmatch criteria
cpe:2.3:o:netgear:ex7000_firmware:*:*:*:*:*:*:*:*
< 1.0.4.8CPE matchmatch criteria
cpe:2.3:o:netgear:r6250_firmware:*:*:*:*:*:*:*:*
< 1.0.4.6CPE matchmatch criteria
cpe:2.3:o:netgear:r6300_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.35%
Probability of exploitation in next 30 days
EPSS Percentile
87.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0335 is in the 79th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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 / 000059147/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Gateways-Routers-and-Extenders-PSV-2016-0074
Vendor Advisory