November 3, 2021 · Applied Cybernetics Group
CVE-2020-24557 — Trend Micro Apex One, OfficeScan, and Worry-Free Business Security
Trend Micro Multiple Products Improper Access Control Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Trend Micro
- Product
- Apex One, OfficeScan, and Worry-Free Business Security
- EPSS
- 83.5th percentile (score 0.019, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-24557
CISA short description
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.
Required action
Apply updates per vendor instructions.