Is CVE-2021-23877 actively exploited?

No active exploitation of CVE-2021-23877 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-23877 be exploited remotely?

No. CVE-2021-23877 requires local access to exploit.

What is the CVSS score of CVE-2021-23877?

CVE-2021-23877 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2021-23877

HIGH

CVE-2021-23877

CWE-269Published: October 26, 2021· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

Privilege escalation vulnerability in the Windows trial installer of McAfee Total Protection (MTP) prior to 16.0.34_x may allow a local user to run arbitrary code as the admin user by replacing a specific temporary file created during the installation of the trial version of MTP.

NVD Source

Technical Analysis

CVE-2021-23877 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.