CVE-2026-34927: Trend Micro Apex One and Vision One SEP origin validation privilege escalation

CVE-2026-34927 · Severity: high · CVSS 7.8 · Published 2026-05-21

Trend Micro Apex One and Vision One endpoint agents are security software used to protect corporate laptops and servers from malware. A vulnerability in these agents could allow a user who already has limited access to a computer to gain full administrative control. This could be used by an attacker to disable security protections or steal sensitive data from the affected machine.

Technologies: Trend Micro Apex One Agent, Trend Micro Apex One as a Service Agent, Trend Micro Vision One Endpoint Security Agent. Vendors: Trend Micro.

Quick answers

Is CVE-2026-34927 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-34927 being exploited in the wild.
How severe is CVE-2026-34927?
High severity, with a CVSS score of 7.8, published 21 May 2026.
Which products and versions are affected?
Trend Micro Apex One as a Service Agent Below 14.0.20731.
Is there a fix for CVE-2026-34927?
A patch was published on 2026-05-21. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-34927 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2026-34927?
Check whether you run Trend Micro Apex One Agent, Trend Micro Apex One as a Service Agent or Trend Micro Vision One Endpoint Security Agent at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An origin validation error (CWE-346) exists in the Trend Micro Apex One and Vision One Standard Endpoint Protection (SEP) agents. The vulnerability stems from insufficient verification of the source of inter-process communications or requests. To exploit this, an attacker must first have the ability to execute low-privileged code on the target Windows system. Successful exploitation allows the attacker to bypass security boundaries and escalate privileges to a higher level, potentially SYSTEM. Trend Micro has released patches for both on-premises and SaaS versions of the affected products to address this issue.

Affected products

  • Trend Micro Apex One (On-prem) Agent Below 17079
  • Trend Micro Apex One as a Service Agent Below 14.0.20731
  • Trend Micro Vision One Endpoint Security - Standard Endpoint Protection (SEP) Agent Below 14.0.20731

Timeline

  • 2026-05-21: disclosed
  • 2026-05-21: advisory
  • 2026-05-21: patched

References

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