CVE-2021-20166

8.8

CVSS
High

PUBLISHED

Netgear RAX43 version 1.0.3.96 contains a buffer overrun vulnerability. The URL parsing functionality in the cgi-bin endpoint of the router...

Exploited in the wild Low complexity No user interaction

Vendor: Netgear
Product: RAX43
Published: Dec 30, 2021
EPSS: 64.2% · 98% pctl

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Description

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.

edge

Weaknesses (CWE)

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS scores

CVSS v3.1 8.8 High

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

CVSS v2.0 5.8 Medium

AV:A/AC:L/Au:N/C:P/I:P/A:P

Exploitation status

Exploited in the wild

Recorded 2026-06-07 00:00:00 UTC · The Shadowserver (via CIRCL)

References

https://www.tenable.com/security/research/tra-2021-55

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source	Added
The Shadowserver (via CIRCL) First	2026-06-07 00:00 UTC

Vulnerability detail