Actively exploited in the wild
Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
Trend Micro - Apex One · Listed in the CISA KEV since 2026-05-21. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2026-34926
MediumCVSS 6.7KEVExploitation Probability (EPSS)
Very high risk96th percentile - higher than 96% of all known CVEs
Summary
A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local attacker to modify a key table on the server to inject malicious code to deploy to agents. The attack requires access to the server and prior administrative credentials.
Risk Assessment
A local attacker with server access could compromise agents, leading to malware propagation across the infrastructure.
Recommendation
Update the Apex One server to the latest version and restrict server access to trusted administrators only.
Original NVD description (English source)
A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local attacker to modify a key table on the server to inject malicious code to deploy to agents on affected installations. This vulnerability is only exploitable on the on-premise version of Apex One and a potential attacker must have access to the Apex One Server and already obtained administrative credentials to the server via some other method to exploit this vulnerability.