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CVE-2018-21181

24
FAUCET Score

CVE-2018-21181 describes a stack-based buffer overflow vulnerability affecting numerous NETGEAR devices, including various D7800, EX, R, WN, and WNDR series models. This flaw allows an authenticated user to execute arbitrary code or cause a denial of service. With a CVSS score of 7.2 (High), the vulnerability is network-exploitable with low attack complexity and high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.1.28CPE matchmatch criteria
cpe:2.3:o:netgear:d7800_firmware:*:*:*:*:*:*:*:*
< 1.0.1.32CPE matchmatch criteria
cpe:2.3:o:netgear:ex2700_firmware:*:*:*:*:*:*:*:*
< 1.0.1.56CPE matchmatch criteria
cpe:2.3:o:netgear:ex6200_firmware:*:*:*:*:*:*:*:*
< 1.0.3.24CPE matchmatch criteria
cpe:2.3:o:netgear:r7500_firmware:*:*:*:*:*:*:*:*
< 1.0.2.40CPE matchmatch criteria
cpe:2.3:o:netgear:r7800_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
1.35%
Probability of exploitation in next 30 days
EPSS Percentile
68.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0135 is in the 60th percentile among its peer group of 5,538 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 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 / 000055177/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-Extenders-PSV-2017-2618
Vendor Advisory