CVE-2020-24557
Trend Micro Multiple Products Improper Access Control Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2020-24557
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.
Severity
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation Context
as of October 17, 2026- CISA added CVE-2020-24557 to the KEV catalog 428 days after its CVE record was published.
- It is one of 12 Trend Micro entries in the CISA KEV catalog, and one of 7 added in 2021.
- Its current EPSS score (2.7%) is higher than that of 11% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Trend Micro | Trend Micro Trend Micro Apex One | 2009 (on premise), SaaS |
| Trend Micro | Trend Micro Trend Micro Worry-Free Business Security | 10.0 SP1 |
References
3 LinksRecord Details
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.