CVE-2020-24557VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2020-24557: Trend Micro Multiple Products Improper Access Control Vulnerability

Affects Trend Micro Apex One, OfficeScan, and Worry-Free Business SecuritySource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
EPSS: 2.7% chance of exploitation in 30 days – higher than 85% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2020-24557 (opens in a new tab)

Description

CVE-2020-24557 is an improper access control vulnerability affecting Trend Micro Apex One, OfficeScan, and Worry-Free Business Security on Microsoft Windows. This flaw allows attackers to manipulate a specific product folder to temporarily disable security features, abuse a Windows function, and escalate privileges. The vulnerability has been exploited in the wild. No explicit patch or remediation details are provided in the input data.

Summary

The vulnerability CVE-2020-24557 in Trend Micro Apex One, OfficeScan, and Worry-Free Business Security products on Windows involves improper access control. An attacker can manipulate a particular product folder to disable security temporarily, abuse a Windows function, and achieve privilege escalation. This vulnerability has been observed to be exploited in the wild, indicating active threat usage. The input data does not specify affected versions or patch availability.

Impact

Successful exploitation can lead to temporary disabling of security protections and privilege escalation on affected systems, increasing the risk of further compromise. The vulnerability has been exploited in the wild, confirming its practical impact and threat to affected environments.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until official fixes are confirmed, organizations should monitor Trend Micro advisories for updates and consider applying any recommended workarounds or mitigations provided by the vendor.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 08:43:23 UTC

References

Related threats