Is CVE-2021-42706 actively exploited?

No active exploitation of CVE-2021-42706 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-42706 be exploited remotely?

No. CVE-2021-42706 requires local access to exploit.

What is the CVSS score of CVE-2021-42706?

CVE-2021-42706 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2021-42706

HIGH

CVE-2021-42706

CWE-416Published: November 15, 2021· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

This vulnerability could allow an attacker to disclose information and execute arbitrary code on affected installations of WebAccess/MHI Designer

NVD Source

Technical Analysis

CVE-2021-42706 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low 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 7.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.