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Vulnerabilities

Vulnerability · CVE-2020-24557

Trend Micro Multiple Products Improper Access Control Vulnerability

Published Sep 1, 2020 · catalog updated Jun 16, 2026 · Trend Micro Apex One, OfficeScan and Worry-Free Business Security Agents

Patch now

CVE-2020-24557 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Trend Micro Apex One, OfficeScan and Worry-Free Business Security Agents against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
2.67%
Remediation
Remediation guidance
Affected products
cpe trendmicro/apex one · cpe trendmicro/worry-free business security · vendor Trend Micro Apex One, OfficeScan and Worry-Free Business Security Agents · vendor Trend Micro Apex One, OfficeScan, and Worry-Free Business Security

A vulnerability in Trend Micro Apex One and Worry-Free Business Security 10.0 SP1 on Microsoft Windows may allow an attacker to manipulate a particular product folder to disable the security temporarily, abuse a specific Windows function and attain privilege escalation. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. Please note that version 1909 (OS Build 18363.719) of Microsoft Windows 10 mitigates hard links, but previous versions are affected.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe trendmicro/apex one2019
  • cpe trendmicro/worry-free business security10.0
  • vendor Trend Micro Apex One, OfficeScan and Worry-Free Business Security Agentsversion unspecified
  • vendor Trend Micro Apex One, OfficeScan, and Worry-Free Business Securityversion unspecified

How to fix CVE-2020-24557

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-24557 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Trend Micro Apex One, OfficeScan and Worry-Free Business Security Agents against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with trendmicro/apex one 2019; trendmicro/worry-free business security 10.0. Apply updates per vendor instructions.

What should an analyst verify?

No weakness class is stored. EPSS 2.67%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 1, 2020 · Catalog

    Detected

    A vulnerability in Trend Micro Apex One and Worry-Free Business Security 10.0 SP1 on Microsoft Windows may allow an attacker to manipulate a particular product folder to disable the security temporarily, abuse a specific Windows function and attain privilege escalation. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerabil

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    A vulnerability in Trend Micro Apex One and Worry-Free Business Security 10.0 SP1 on Microsoft Windows may allow an attacker to manipulate a particular product folder to disable the security temporarily, abuse a specific Windows function and attain privilege escalation. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerabil

Sources

  • CISA KEVConfirmed exploitationCVE-2020-24557

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2020-24557

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-24557

    30-day exploitation probability 2.7%

    first.org
  • NIST NVDVulnerability recordCVE-2020-24557

    A vulnerability in Trend Micro Apex One and Worry-Free Business Security 10.0 SP1 on Microsoft Windows may allow an attacker to manipulate a particular product folder to disable the security temporarily, abuse a specific Windows function and attain privilege escalation. An attack

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2020-24557

    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, an

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.