CVE-2021-25229: 
Trend Micro Apex One Agent vulnerability analysis and mitigation

An improper access control vulnerability (CVE-2021-25229) was discovered in Trend Micro Apex One (both on-premises and SaaS versions) and OfficeScan XG SP1. The vulnerability was reported on August 5, 2020, and publicly disclosed on January 29, 2021. The affected systems include Trend Micro Apex One and OfficeScan XG SP1, specifically their web console components (ZDI Advisory, CVE Details).

The vulnerability exists within the web console, which listens on TCP port 4343 by default. The specific flaw stems from improper access control implementation. The vulnerability has been assigned a CVSS score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N), indicating a medium severity level (ZDI Advisory).

When exploited, this vulnerability allows remote attackers to disclose sensitive information about the database server from affected installations. The attack can be executed without requiring authentication, potentially exposing critical system information (ZDI Advisory).

The vulnerability can be exploited remotely by unauthenticated users. The attack vector is network-accessible and requires low attack complexity with no user interaction needed, as indicated by the CVSS metrics (ZDI Advisory).

Trend Micro has released security updates to address this vulnerability. Users of affected products should apply the appropriate patches: Apex One requires the CP9167 patch, and OfficeScan XG SP1 needs the CP6040 patch (CERT-FR Advisory).