CVE-2021-36741: Trend Micro Multiple Products Improper Input Validation Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 5% chance of exploitation in the next 30 days.

An improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service, OfficeScan XG, and Worry-Free Business Security 10.0 SP1 allows a remote attached to upload arbitrary files on affected installations. Please note: an attacker must first obtain the ability to logon to the product�s management console in order to exploit this vulnerability.

Affected products

• Trend Micro Apex One: version 2019 only
• Trend Micro OfficeScan: version xg only
• Trend Micro OfficeScan Business Security: version 10.0 only
• Trend Micro Worry-Free Business Security: version 10.0 only

Published 2021-07-29. Last modified 2026-06-17.