Is CVE-2021-20120 actively exploited?

No active exploitation of CVE-2021-20120 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-20120 be exploited remotely?

Yes. CVE-2021-20120 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-20120?

CVE-2021-20120 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2021-20120

CWE-352Published: October 21, 2021· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

The administration web interface for the Arris Surfboard SB8200 lacks any protections against cross-site request forgery attacks. This means that an attacker could make configuration changes (such as changing the administrative password) without the consent of the user.

NVD Source

Technical Analysis

CVE-2021-20120 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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 8.8.