Path Traversal in Trendmicro Apex_one
CVE-2026-34926
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 vuln…
EPSS: 0.010 (77.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L.
Affected products
- Trendmicro Apex_one
- Trend Micro, Inc. Trendai Apex One — versions 2019 (14.0)
- Trend Micro, Inc. Trendai Apex One As A Service — versions SaaS
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- security@trendmicro.com (Vendor Advisory)
- security@trendmicro.com (Vendor Advisory)
- security@trendmicro.com (Third Party Advisory)
- security@trendmicro.com (Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-34926?
- CVE-2026-34926 is a medium-severity vulnerability in Trendmicro Apex_one, classified under Relative Path Traversal. CVSS score: 6.7/10. Published 2026-05-21.
- How severe is CVE-2026-34926?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2026-34926 known to be exploited?
- Yes. CVE-2026-34926 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-05-21), indicating it is being actively exploited. 1 public proof-of-concept repositories are indexed.