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CVE-2018-21174

23
FAUCET Score

CVE-2018-21174 describes a stack-based buffer overflow vulnerability affecting several NETGEAR router models, including the D6100, R7500, R7800, and R9000, among others, prior to specific firmware versions. This high-severity vulnerability (CVSS 7.2) allows an authenticated attacker to achieve high impact on confidentiality, integrity, and availability over the network with low attack complexity. While the vulnerability is significant, there is currently no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, nor notable community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.0.57CPE matchmatch criteria
cpe:2.3:o:netgear:d6100_firmware:*:*:*:*:*:*:*:*
< 1.0.0.122CPE matchmatch criteria
cpe:2.3:o:netgear:r7500_firmware:*:*:*:*:*:*:*:*
< 1.0.2.40CPE matchmatch criteria
cpe:2.3:o:netgear:r7800_firmware:*:*:*:*:*:*:*:*
< 1.0.2.52CPE matchmatch criteria
cpe:2.3:o:netgear:r9000_firmware:*:*:*:*:*:*:*:*
< 1.0.2.92CPE matchmatch criteria
cpe:2.3:o:netgear:wndr3700_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
1.63%
Probability of exploitation in next 30 days
EPSS Percentile
73.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0163 is in the 68th 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 / 000055184/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-Gateways-PSV-2017-2625
Vendor Advisory