CVEs / CVE-2026-34926
CVE-2026-34926: Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
- Known exploited in the CISA KEV catalog since 21 May 2026
- medium 6.7 CVSS 3.1 (from the CNA)
- EPSS 13.4% chance of exploitation in the next 30 days, higher than 96% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Trend Micro Apex One (on-premise) contains a directory traversal vulnerability that 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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Trend Micro, Inc. TrendAI Apex One | from 2019 (14.0), before 14.0.0.17079 | 14.0.0.17079 |
| Trend Micro, Inc. TrendAI Apex One as a Service | from SaaS, before 14.0.20731 | 14.0.20731 |
Exploitation
| In CISA KEV since | 21 May 2026 |
|---|---|
| Due date for US federal agencies | 4 Jun 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 6.7 mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:LScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-23 |
References
- CVE-2026-34926 on NVD
- CVE-2026-34926 in the CISA KEV catalog
- https://success.trendmicro.com/en-US/solution/KA-0023430 (cited by CISA)
- https://jvn.jp/en/vu/JVNVU90583059/ Third Party Advisory
- https://success.trendmicro.com/en-US/solution/KA-0023430 Vendor Advisory
- https://success.trendmicro.com/ja-JP/solution/KA-0022974 Vendor Advisory
- https://www.jpcert.or.jp/english/at/2026/at260014.html Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34926 Third Party Advisory, US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.