---
title: "CVE-2020-24557: Trend Micro Apex One vulnerability | CubePath"
description: "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…"
language: en
source: https://cubepath.com/security/cve/CVE-2020-24557
---

# CVE-2020-24557: Trend Micro Apex One vulnerability | CubePath

## Description

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.

Official description from the CVE record, published by trendmicro. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-24557)

## Key data

### CVSS 3.1 High 7.8

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

| Metric                 | Value     | What it means                                                                             |
| ---------------------- | --------- | ----------------------------------------------------------------------------------------- |
| Attack vector          | Local     | The attacker needs local access to the system, or to trick a user into running something. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.                     |
| Privileges required    | Low       | A basic user account is needed.                                                           |
| User interaction       | None      | No action from any user is needed.                                                        |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                         |
| Confidentiality impact | High      | Serious or total effect on the secrecy of data.                                           |
| Integrity impact       | High      | Serious or total effect on the trustworthiness of data.                                   |
| Availability impact    | High      | Serious or total effect on availability.                                                  |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.02666 (2.7% probability)

Percentile

85.9%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

Trend Micro Multiple Products Improper Access Control Vulnerability

Added to the catalog

Nov 3, 2021

Federal due date

May 3, 2022

### CISA assessment as of Feb 6, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

no

Technical impact

total

## Affected products

Products listed in the CVE record, as the CNA published them.

- Trend Micro Apex One

  - affected: 2009 (on premise), SaaS
- Trend Micro Worry-Free Business Security

  - affected: 10.0 SP1

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [success.trendmicro.com/solution/000263632](https://success.trendmicro.com/solution/000263632)
- [zerodayinitiative.com/advisories/ZDI-20-1094](https://www.zerodayinitiative.com/advisories/ZDI-20-1094/)
- [success.trendmicro.com/solution/000267260](https://success.trendmicro.com/solution/000267260)

## Timeline

1. ID reserved Aug 20, 2020
2. Record published Sep 1, 2020
3. Added to CISA KEV Nov 3, 2021
4. Record last updated Oct 21, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:36 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)