CVE-2026-34927

SYSTEM code execution via unvalidated service commands

Published May 21, 2026 · Updated May 21, 2026

Origin validation error in Trend Micro Apex One and SaaS agents allows local users to execute arbitrary code as SYSTEM. The Apex One NT Listener service accepts commands without adequately validating their origin, allowing low-privileged code to issue trusted commands. Exploitation requires prior low-privileged code execution on a Windows endpoint; on-premises builds before 14.0.0.17079 and SaaS agent builds before 14.0.20731 are affected.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Trend Micro Apex One and SaaS agents allows local users to execute arbitrary code as SYSTEM. The Apex One NT Listener service accepts commands without adequately validating their origin, allowing low-privileged code to issue trusted commands. Exploitation requires prior low-privileged code execution on a Windows endpoint; on-premises builds before 14.0.0.17079 and SaaS agent builds before 14.0.20731 are affected.

The record

CVE
CVE-2026-34927
Published
May 21, 2026
Updated
May 21, 2026
Vendor
Trend Micro
Product
Apex One as a Service
Classifications
CWE-346, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2026CVE publishedPublication date reported by the CVE source.
  2. May 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=SaaS <14.0.20731

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Trend Micro · Apex One as a Serviceversion=SaaS <14.0.20731
Trend Micro · Apex Oneversion=2019 (14.0) <14.0.0.17079

Published CVSS scores

7.8Trend Micro, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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