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Actively exploitedCVSS 6.7 · MEDIUM

CVE-2026-34926

Trend Micro Apex One (on-premise) contains a directory traversal vulnerability that 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.

View on NVD

Analysis

Esta vulnerabilidad de salto de directorio en Trend Micro Apex One (on-premise) permite a un atacante inyectar código malicioso para distribuirlo a todos los agentes conectados. El fallo está siendo explotado activamente en ataques reales, permitiendo el despliegue masivo de malware desde el servidor de administración. Es fundamental actualizar las instalaciones locales de inmediato para proteger los endpoints de la organización.

Relevant roles

CyberSecurityWindowsBackend

Severity

Score: 6.7(MEDIUM)
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
AV: LOCAL
AC: HIGH
PR: HIGH
UI: NONE
S: CHANGED
C: HIGH
I: LOW
A: LOW
Weakness (CWE): CWE-23

CISA KEV

Added to KEV: 2026-05-21
Federal patch deadline: 2026-06-04
Known ransomware use: Unknown
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.

EPSS

Probability of exploitation (next 30 days): 0.0102 (1.0%)
Percentile: 77.5%
EPSS: 2026-06-04

Affects

trendmicro:apex_one

Technical 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.

Published: 5/21/2026, 2:16:45 PM
Last modified: 5/22/2026, 12:47:18 PM

References

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