CVE-2021-42104: Trend Micro Apex One

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Unnecessary privilege vulnerabilities in Trend Micro Apex One, Apex One as a Service, Worry-Free Business Security 10.0 SP1 and Worry-Free Business Security Services could allow a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. This vulnerability is similar to but not identical to CVE-2021-42105, 42106 and 42107.

Affected products

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

Published 2021-10-21. Last modified 2026-06-17.