---
id: "CVE-2026-34926"
kind: "vulnerability"
aliases: ["CVE-2026-34926"]
title: "trendmicro apex one: A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local\u2026"
severity: "high"
cvss: 6.7
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Trend Micro Apex One", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "trendmicro apex one", "fixed": ["14.0.0.17079"], "affected": "< 14.0.0.17079", "ecosystem": "vendor"}, {"name": "trendmicro apex one", "fixed": ["14.0.20731"], "affected": "< 14.0.20731", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["endpoint-management", "exploited", "infrastructure", "on-premise", "trend-micro-apex-one"]
not_affected_if: ["apex-one-saas", "no-on-premise-server"]
published_at: "2026-05-21T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-34926", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34926", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# trendmicro apex one: A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local…

Trend Micro Apex One on-premise has a directory traversal flaw that lets a pre-authenticated local attacker modify a key table on the server. The attacker can inject malicious code that the server then deploys to managed agents.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Trend Micro Apex One affected ? fixed ?
- vendor:trendmicro apex one affected < 14.0.0.17079 fixed 14.0.0.17079
- vendor:trendmicro apex one affected < 14.0.20731 fixed 14.0.20731

## Fix

Apply the mitigations from Trend Micro's vendor advisory, or discontinue use of the product if mitigations are unavailable (per CISA required action).

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-34926
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-34926

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_