Is CVE-2020-3331 actively exploited?

No active exploitation of CVE-2020-3331 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-3331 be exploited remotely?

Yes. CVE-2020-3331 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-3331?

CVE-2020-3331 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-3331

CRITICAL

CVE-2020-3331

CWE-119Published: July 16, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A vulnerability in the web-based management interface of Cisco RV110W Wireless-N VPN Firewall and Cisco RV215W Wireless-N VPN Router could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. The vulnerability is due to improper validation of user-supplied input data by the web-based management interface. An attacker could exploit this vulnerability by sending crafted requests to a targeted device. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the root user.

NVD Source

Technical Analysis

CVE-2020-3331 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.