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CVE-2018-21210

26
FAUCET Score

CVE-2018-21210 describes a critical buffer overflow vulnerability in various NETGEAR devices, including specific models of D3600, D6000, D7800, and others, prior to their respective patched firmware versions. This flaw allows an unauthenticated attacker on the adjacent network to execute arbitrary code, leading to high impacts on confidentiality, integrity, and availability. With a CVSS score of 8.8 (High), it represents a significant risk due to its low attack complexity and lack of required user interaction or privileges. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.0.67CPE matchmatch criteria
cpe:2.3:o:netgear:d3600_firmware:*:*:*:*:*:*:*:*
< 1.0.0.67CPE matchmatch criteria
cpe:2.3:o:netgear:d6000_firmware:*:*:*:*:*:*:*:*
< 1.0.1.30CPE matchmatch criteria
cpe:2.3:o:netgear:d7800_firmware:*:*:*:*:*:*:*:*
< 1.0.1.28CPE matchmatch criteria
cpe:2.3:o:netgear:ex2700_firmware:*:*:*:*:*:*:*:*
< 1.0.1.20CPE matchmatch criteria
cpe:2.3:o:netgear:r6100_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
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
47.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 51st percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 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 / 000055139/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-Gateways-and-Extenders-PSV-2017-2492
Vendor Advisory