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CISA KEV Alert — Active Real-World Exploitation Confirmed
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog and is being actively exploited right now.
Trend Micro Apex One Path Traversal RCE (CVE-2026-34926) | MSSP Advisory
Critical🔴 KEV ALERTHigh Confidence
DateMay 26, 2026
CVECVE-2026-34926
CVSS Score6.7
Affectedapex_one
Risk Assessment
Client Exposure:High
Briefing Priority:Immediate
Barrier to Entry:High
📋Executive Summary
A zero-day path traversal vulnerability in Trend Micro Apex One (CVE-2026-34926) is being actively exploited by attackers. The flaw allows attackers to manipulate directory paths to access unauthorized files on systems running the Apex One security platform. CISA has issued an official warning after Trend Micro confirmed exploitation in the wild.
⚠️Why It Matters for MSSPs
MSSPs running Apex One in their own environment face immediate compromise risk since attackers are already weaponizing this flaw. Any MSSP managing clients with Apex One deployments owns an emergency patch notification because those environments are vulnerable to active exploitation right now.
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