Trend Micro Apex One, OfficeScan, and Worry-Free Business Security
YES - ON THE CISA KEV LIST
CVE-2020-24557
Trend Micro Multiple Products Improper Access Control Vulnerability
overdue since 2022-05-03
Trend Micro: 12 entries (0.7% of all KEV entries are from this vendor); 1 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
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 (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2020-24557
References
Other KEV entries for this vendor: Trend Micro
- CVE-2026-34926 - Apex One (2026-05-21)
- CVE-2025-54948 - Apex One (2025-08-18)
- CVE-2023-41179 - Apex One and Worry-Free Business Security (2023-09-21)
- CVE-2022-40139 - Apex One and Apex One as a Service (2022-09-15)
- CVE-2022-26871 - Apex Central (2022-03-31)
- CVE-2019-18187 - OfficeScan (2021-11-03)
- CVE-2020-8467 - Apex One and OfficeScan (2021-11-03)
- CVE-2020-8468 - Apex One, OfficeScan and Worry-Free Business Security Agents (2021-11-03)
Go deeper
KEV deadlines are a governance problem as much as a patching one. TrebSec's AI governance packs help small teams document, assign, and evidence exactly this work.
AI Governance Policy Pack - $79 AI Vendor Workbook - $49 Both packs bundled - $99