ACTIVELY EXPLOITED
CVE-2020-24557: Trend Micro Multiple Products Improper Access Control Vulnerability
| Vendor | Trend Micro |
|---|---|
| Product | Apex One, OfficeScan, and Worry-Free Business Security |
| Actively exploited | Yes |
| Added to CISA KEV | 3 Nov 2021 |
| CISA federal deadline | 3 May 2022 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
Trend Micro Apex One, OfficeScan, and Worry-Free Business Security on Microsoft Windows contain an improper access control vulnerability that may allow an attacker to manipulate a particular product folder to disable the security temporarily, abuse a specific Windows function, and attain privilege escalation.
SOURCES
Other Trend Micro flaws
- CVE-2026-34926: Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
- CVE-2025-54948: Trend Micro Apex One OS Command Injection Vulnerability
- CVE-2023-41179: Trend Micro Apex One and Worry-Free Business Security Remote Code Execution Vulnerability
- CVE-2022-40139: Trend Micro Apex One and Apex One as a Service Improper Validation Vulnerability
- CVE-2022-26871: Trend Micro Apex Central Arbitrary File Upload Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.