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

Source: https://junglewise.ai/threats/cve-2020-24557-trend-micro-multiple-products-improper-access-control  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2020-24557 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2021-11-03

Trend Micro Apex One, OfficeScan, and Worry-Free Business Security on Windows contain an improper access control vulnerability. A local attacker with low-privileged code execution can manipulate specific product folders to disable security features and abuse Windows functions to achieve privilege escalation.

Technologies: [Trend Micro Officescan](https://junglewise.ai/threats/technologies/officescan). Vendors: [Trend Micro](https://junglewise.ai/threats/vendors/trend-micro).

## Quick answers

**Is CVE-2020-24557 exploited in the wild?** Yes. CVE-2020-24557 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2020-24557?** Critical severity, with a CVSS score of 7.8, published 3 November 2021.

**Which products and versions are affected?** Trend Micro Apex One 2019, SaaS; Trend Micro Worry-Free Business Security 10.0 SP1; Trend Micro OfficeScan.

**Is there a fix for CVE-2020-24557?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2020-24557 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2020-24557?** Check whether you run Trend Micro Officescan. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Trend Micro Apex One 2019, SaaS
- Trend Micro Worry-Free Business Security 10.0 SP1
- Trend Micro OfficeScan

## Timeline

- 2020-09-08: disclosed: Initial NVD analysis date
- 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-03: exploited: Confirmed exploited in the wild per CISA KEV catalog entry date

## Related threats

- [Trend Micro Apex One and OfficeScan Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2020-8467-trend-micro-apex-one-and-officescan-remote-code-execution)
- [Trend Micro Multiple Products Content Validation Escape Vulnerability](https://junglewise.ai/threats/cve-2020-8468-trend-micro-multiple-products-content-validation-escape)
- [Trend Micro OfficeScan Directory Traversal Vulnerability](https://junglewise.ai/threats/cve-2019-18187-trend-micro-officescan-directory-traversal-vulnerability)
- [Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability](https://junglewise.ai/threats/cve-2020-8599-trend-micro-apex-one-and-officescan-authentication-bypass)