What is CVE-2021-20166?

CVE-2021-20166 is a high-severity vulnerability in NETGEAR Rax43, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2021-12-30.

How severe is CVE-2021-20166?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-20166 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in NETGEAR Rax43

CVE-2021-20166

Netgear RAX43 version 1.0.3.96 contains a buffer overrun vulnerability. The URL parsing functionality in the cgi-bin endpoint of the router containers a buffer overrun issue that can redirection control flow of the applicaiton.

Vulnerability class: Buffer Overflow

EPSS: 0.022 (80.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Netgear Rax43
Netgear Rax43_firmware — versions 1.0.3.96
N/a Netgear Rax43 — versions 1.0.3.96

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

vulnreport@tenable.com (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-20166?: CVE-2021-20166 is a high-severity vulnerability in NETGEAR Rax43, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2021-12-30.
How severe is CVE-2021-20166?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-20166 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.