May 21, 2026 · Applied Cybernetics Group
CVE-2026-34926 — Trend Micro Apex One
Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
- Added to KEV
2026-05-21- Federal due date
2026-06-04- Vendor
- Trend Micro
- Product
- Apex One
- EPSS
- 77.5th percentile (score 0.010, as of
2026-06-08) - NVD CVSS v3.1
- 6.7 (MEDIUM)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-34926
CISA short description
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.
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.
NVD 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.