CVE-2026-34926

Undergoing Analysis

Published: 21 May 2026, 13:03

Last modified:22 May 2026, 12:47

Vulnerability Summary

Overall Risk (default)

medium

27/100

CVSS Score

6.7 MEDIUM

v3.1 (cve.org)

EPSS Score

0.25% LOW

0% probability

KEV

Listed

CISA

1 listing

Ransomware

No reports

Public exploits

None found

Dark Web

Not detected

Timeline

21 May 2026, 13:03

Published

Vulnerability first disclosed

21 May 2026, 00:00

Added to CISA KEV

Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability

22 May 2026, 12:47

Last Modified

Vulnerability information updated

04 Jun 2026, 00:00

CISA Remediation Due

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Description

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.

CVSS Metrics

v3.1•MEDIUM•Score: 6.7CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L

EPSS Trends

Current EPSS score: 0.25%• Percentile: 49%

Techniques & Countermeasures

CWE-23•Relative Path Traversal
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.

Affected Systems

trend micro, inc.•trendai apex one
≥ 2019 (14.0), < 14.0.0.17079
trend micro, inc.•trendai apex one as a service
≥ SaaS, < 14.0.20731