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CVE-2018-21212

26
FAUCET Score

CVE-2018-21212 describes a buffer overflow vulnerability affecting numerous NETGEAR router and extender models, including the D3600, D6000, D6100, and R7500, among others. This high-severity vulnerability (CVSS 8.8) allows an unauthenticated attacker on the adjacent network to execute arbitrary code with high impact on confidentiality, integrity, and availability. While the vulnerability has a high FAUCET Risk Score, there is no evidence of active exploitation, public exploit code, or significant community discussion. Organizations should update affected NETGEAR devices to the specified patched firmware versions to mitigate this risk.

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:*:*:*:*:*:*:*:*
< 1.0.0.56CPE matchmatch criteria
cpe:2.3:o:netgear:d6100_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:*:*:*:*:*:*:*:*

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
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 58th 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 / 000055137/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-Gateways-and-Extenders-PSV-2017-2490
Vendor Advisory