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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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Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
05/21/2026
06/04/2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE Modified by Trend Micro, Inc.6/17/2026 6:39:49 AM
Action
Type
Old Value
New Value
Added
Affected
[{"vendor":"Trend Micro, Inc.","product":"TrendAI Apex One","cpes":["cpe:2.3:a:trendmicro:apexone_op:14.0.0.17079:*:*:*:*:*:*:*"],"versions":[{"version":"2019 (14.0)","lessThan":"14.0.0.17079","versionType":"semver","status":"affected"}]},{"vendor":"Trend Micro, Inc.","product":"TrendAI Apex One as a Service","cpes":["cpe:2.3:a:trendmicro:apexone_saas:14.0.0.20731:*:*:*:*:*:*:*"],"versions":[{"version":"SaaS","lessThan":"14.0.20731","versionType":"semver","status":"affected"}]}]
Initial Analysis by NIST5/22/2026 8:47:18 AM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*cpe:2.3:a:trendmicro:apex_one:*:*:*:*:saas:windows:*:* versions up to (excluding) 14.0.20731
*cpe:2.3:a:trendmicro:apex_one:*:*:*:*:on-premises:windows:*:* versions up to (excluding) 14.0.0.17079
Added
Reference Type
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34926 Types: Third Party Advisory, US Government Resource
Added
Reference Type
Trend Micro, Inc.: https://jvn.jp/en/vu/JVNVU90583059/ Types: Third Party Advisory
CVE CISA KEV Update by Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government5/21/2026 3:00:00 PM
Action
Type
Old Value
New Value
Added
Date Added
2026-05-21
Added
Due Date
2026-05-21
Added
Required Action
2026-05-21
Added
Vulnerability Name
2026-05-21
New CVE Received from Trend Micro, Inc.5/21/2026 10:16:45 AM
Action
Type
Old Value
New Value
Added
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.