CVE-2026-34926

MediumActively exploited (CISA KEV)

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.

SeverityMedium
CVSS6.7
Exploit probability—
ProductTrend Micro Apex One
PublishedMay 21, 2026
First seenMay 21, 2026
Added to KEVMay 21, 2026
Weakness typeCWE-23CWE-23

How to fix

CISA 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.

CISA due date: Jun 4, 2026
Update
  • trendmicro apex_one14.0.0.17079, 14.0.20731 or later

Affected products

ProductAffected versionsFixed in
trendmicro apex_onev < 14.0.0.17079, v < 14.0.2073114.0.0.17079, 14.0.20731

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.

CVE-2026-34926 · Trend Micro Apex One · Dark Radar