Is CVE-2021-29074 actively exploited?

No active exploitation of CVE-2021-29074 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-29074 be exploited remotely?

Partially. CVE-2021-29074 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2021-29074?

CVE-2021-29074 has a CVSS score of 8.4 (HIGH).

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HIGH

CVE-2021-29074

CWE-787Published: March 23, 2021· Updated: Jun 17, 2026

8.4

CVSS v3.1

Official Description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects RBW30 before 2.6.2.2, RBK852 before 3.2.17.12, RBK853 before 3.2.17.12, RBK854 before 3.2.17.12, RBR850 before 3.2.17.12, RBS850 before 3.2.17.12, RBK752 before 3.2.17.12, RBK753 before 3.2.17.12, RBK753S before 3.2.17.12, RBK754 before 3.2.17.12, RBR750 before 3.2.17.12, and RBS750 before 3.2.17.12.

NVD Source

Technical Analysis

CVE-2021-29074 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.4.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.