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CVE-2021-20174

25
FAUCET Score

CVE-2021-20174 affects Netgear Nighthawk R6700 routers (firmware version 1.0.4.120), stemming from its web interface's exclusive use of unencrypted HTTP. This exposes sensitive information like usernames and passwords to cleartext transmission, posing a high risk of compromise. With a CVSS score of 7.5, this vulnerability is easily exploitable over the network without authentication or user interaction, leading to high confidentiality impact. While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community discussion and media coverage, indicating awareness of the issue.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.4.120CPE matchmatch criteria
cpe:2.3:o:netgear:r6700_firmware:1.0.4.120:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 22nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

giteavendor investigatingvia llm_extracted
meterspherevendor investigatingvia llm_extracted
qnapvendor investigatingvia llm_extracted

Vendor Advisories (3)

giteallm-gitea-f2a3ab99bd58388dHIGH

Netgear Nighthawk R6700 Multiple Vulnerabilities

Dec 30, 2021
qnapllm-qnap-47bf75da7266b4faHIGH

Netgear Nighthawk R6700 Multiple Vulnerabilities

Dec 30, 2021
meterspherellm-metersphere-6689b6def8cea0e0HIGH

Netgear Nighthawk R6700 Multiple Vulnerabilities

Dec 30, 2021

References

tenable.com / security/research/tra-2021-57
Third Party Advisory