Is CVE-2026-34926 exploited in the wild?

Yes. CVE-2026-34926 is known to be exploited in the wild, first recorded on 21 May 2026. Treat it as urgent.

How severe is CVE-2026-34926?

Critical severity, with a CVSS score of 6.7, published 21 May 2026.

Is there a fix for CVE-2026-34926?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-34926 attacked?

It is attacked with local access, in a network appliance.

Am I affected by CVE-2026-34926?

Check whether anything you run is named in the advisory. 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.

CVE-2026-34926: Trend Micro Apex One directory traversal in on-premise server

CVE-2026-34926 · Severity: critical · CVSS 6.7 · Exploited in the wild · Published 2026-05-21

Trend Micro Apex One is a centralized security management platform used to protect corporate endpoints. A vulnerability in the on-premise version allows an attacker who already has administrative access to the server to manipulate internal configuration files. This could lead to the deployment of malicious code to all connected computers (agents) across the organization, potentially resulting in a widespread compromise of the corporate network.

Quick answers

Is CVE-2026-34926 exploited in the wild?: Yes. CVE-2026-34926 is known to be exploited in the wild, first recorded on 21 May 2026. Treat it as urgent.
How severe is CVE-2026-34926?: Critical severity, with a CVSS score of 6.7, published 21 May 2026.
Which products and versions are affected?: Trend Micro Apex One (On-Premise).
Is there a fix for CVE-2026-34926?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-34926 attacked?: It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-34926?: Check whether anything you run is named in the advisory. 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

A relative path traversal vulnerability (CWE-23) exists in the Trend Micro Apex One (on-premise) server component. To exploit this, an attacker must have local access to the server and have already obtained administrative credentials. The flaw allows the attacker to bypass directory restrictions to modify a key table on the server. Successful exploitation enables the injection of malicious code which is then distributed to and executed by the Apex One agents installed on managed endpoints. This vulnerability has reportedly been observed in the wild.

Affected products

Trend Micro Apex One (On-Premise)

Timeline

2026-05-21: advisory: Initial disclosure by Trend Micro and NVD
2026-05-21: exploited: Reported as exploited in the wild at time of publication

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