CVE-2020-24557: Trend Micro Multiple Products Improper Access Control Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 2.7% chance of exploitation in the next 30 days.

A vulnerability in Trend Micro Apex One and Worry-Free Business Security 10.0 SP1 on Microsoft Windows may allow an attacker to manipulate a particular product folder to disable the security temporarily, abuse a specific Windows function and attain privilege escalation. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. Please note that version 1909 (OS Build 18363.719) of Microsoft Windows 10 mitigates hard links, but previous versions are affected.

Affected products

• Trend Micro Apex One: affected versions not specified; version 2019 only
• Trend Micro Worry-Free Business Security: version 10.0 only

Published 2020-09-01. Last modified 2026-06-17.