Is CVE-2021-45540 actively exploited?

No active exploitation of CVE-2021-45540 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-45540 be exploited remotely?

Partially. CVE-2021-45540 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2021-45540?

CVE-2021-45540 has a CVSS score of 8.4 (HIGH).

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HIGH

CVE-2021-45540

CWE-77Published: December 26, 2021· Updated: Jun 17, 2026

8.4

CVSS v3.1

Official Description

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects R7000 before 1.0.11.126, R7900 before 1.0.4.46, R7900P before 1.4.2.84, R7960P before 1.4.2.84, R8000 before 1.0.4.74, R8000P before 1.4.2.84, RAX200 before 1.0.3.106, MR60 before 1.0.6.110, RAX45 before 1.0.2.66, RAX80 before 1.0.3.106, MS60 before 1.0.6.110, RAX50 before 1.0.2.66, and RAX75 before 1.0.3.106.

NVD Source

Technical Analysis

CVE-2021-45540 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.