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CVE-2021-20168

23
FAUCET Score

CVE-2021-20168 describes a critical vulnerability in Netgear RAX43 firmware version 1.0.3.96, where insufficient protection of the UART interface allows for unauthorized access. An attacker with physical access can connect to the UART port, log in with default "admin:admin" credentials, and execute commands as the root user. This vulnerability carries a CVSS score of 6.8 (Medium) due to the high impact on confidentiality, integrity, and availability, though it requires physical proximity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.3.96CPE matchmatch criteria
cpe:2.3:o:netgear:rax43_firmware:1.0.3.96:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

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

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 54th percentile among its peer group of 1,532 CVEs.

Social Chatter

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

Vendor Patches (3)

giteavendor investigatingvia llm_extracted
meterspherevendor investigatingvia llm_extracted
qnapvendor investigatingvia llm_extracted

Vendor Advisories (3)

giteallm-gitea-41f95e9646256595CRITICAL

Netgear Nighthawk RAX43 Multiple Vulnerabilities

Dec 30, 2021
qnapllm-qnap-67f935ea702522d7CRITICAL

Netgear Nighthawk RAX43 Multiple Vulnerabilities

Dec 30, 2021
meterspherellm-metersphere-c2099e1c7a05a5afCRITICAL

Netgear Nighthawk RAX43 Multiple Vulnerabilities

Dec 30, 2021

References

tenable.com / security/research/tra-2021-55
Third Party Advisory