CVE-2020-24557
Trend Micro Multiple Products Improper Access Control Vulnerability
Trend Micro Apex One, OfficeScan, and Worry-Free Business SecurityApplications & CMS
CVSS
7.8HighExploit odds (EPSS)2.67%Chance of exploitation activity in the next 30 days, higher than 85% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
CISA required actionApply updates per vendor instructions. CISA KEV
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Timeline
Description
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.
Text from CVE List
Affected versions 2
- Trend Micro Apex Oneaffected: 2009 (on premise), SaaSCVE List
- Trend Micro Worry-Free Business Securityaffected: 10.0 SP1CVE List
References 5
- zerodayinitiative.com/advisories/ZDI-20-1094/Advisoryvia CVE List
- nvd.nist.gov/vuln/detail/CVE-2020-24557Referencevia CISA KEV
- success.trendmicro.com/solution/000263632Referencevia CVE List
- success.trendmicro.com/solution/000267260Referencevia CVE List
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-24557Referencevia CVE List