Is CVE-2021-40425 actively exploited?

No active exploitation of CVE-2021-40425 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40425 be exploited remotely?

No. CVE-2021-40425 requires local access to exploit.

What is the CVSS score of CVE-2021-40425?

CVE-2021-40425 has a CVSS score of 6.5 (MEDIUM).

HOME VULNERABILITIESCVE-2021-40425

MEDIUM

CVE-2021-40425

CWE-125Published: April 14, 2022· Updated: Jun 17, 2026

6.5

CVSS v3.1

Official Description

An out-of-bounds read vulnerability exists in the IOCTL GetProcessCommand and B_03 of Webroot Secure Anywhere 21.4. A specially-crafted executable can lead to denial of service. An attacker can issue an ioctl to trigger this vulnerability. An out-of-bounds read vulnerability exists in the IOCTL GetProcessCommand and B_03 of Webroot Secure Anywhere 21.4. An IOCTL_B03 request with specific invalid data causes a similar issue in the device driver WRCore_x64. An attacker can issue an ioctl to trigger this vulnerability.

NVD Source

Technical Analysis

CVE-2021-40425 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 availability disruption (denial of service), with a CVSS base score of 6.5.

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.