CVE-2020-24557: Trend Micro Multiple Products Improper Access Control Vulnerability
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-4c5b9564fca0, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- Trend Micro Multiple Products Improper Access Control Vulnerability
- Vendor
- Trend Micro
- Product
- Apex One, OfficeScan, and Worry-Free Business Security
- Added to the catalog
- 2021-11-03
- Due date for US federal agencies
- 2022-05-03
- Catalog version
- 2026.10.30
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.
Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.
Links in CISA's notes
Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
NVD analysis
- Status
- Analyzed
- Published
- 2020-09-01T19:15:11.870
- Last modified
- 2026-06-17T03:05:45.430
- Weaknesses
- NVD-CWE-Other
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.
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | [email protected] (Primary) |
| CVSS 3.1 | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | 7.2 | HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C | [email protected] (Primary) |
References
- https://success.trendmicro.com/solution/000263632 (Vendor Advisory)
- https://success.trendmicro.com/solution/000267260 (Vendor Advisory)
- https://www.zerodayinitiative.com/advisories/ZDI-20-1094/ (Third Party Advisory, VDB Entry)
- https://success.trendmicro.com/solution/000263632 (Vendor Advisory)
- https://success.trendmicro.com/solution/000267260 (Vendor Advisory)
- https://www.zerodayinitiative.com/advisories/ZDI-20-1094/ (Third Party Advisory, VDB Entry)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-24557 (US Government Resource)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-02T23:41:51.476Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-24557
CVE record
- Assigner
- trendmicro
- State
- PUBLISHED
- Published
- 2020-09-01T18:55:27.000Z
- Updated
- 2025-10-21T23:35:37.172Z
- Problem types
- Improper Access Control Privilege Escalation
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.
References
- https://success.trendmicro.com/solution/000263632
- https://www.zerodayinitiative.com/advisories/ZDI-20-1094/
- https://success.trendmicro.com/solution/000267260
Read on 2026-11-03T01:04:00.561Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2020/24xxx/CVE-2020-24557.json
Sources and licences
CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
Cite this page
Dragons Eye Ransomware Tracker, "CVE-2020-24557: Trend Micro Multiple Products Improper Access Control Vulnerability",
entity page, dataset version ref-4c5b9564fca0, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2020-24557 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T03:05:45.430.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:35:37.172Z.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.