CVE-2026-34926 — Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
Overview
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.
Vulnerability details
- CVE ID
- CVE-2026-34926
- Vulnerability
- Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
- Vendor
- Trend Micro
- Affected products
- Trend Micro: Apex One
- Severity
- HIGH
- Exploitation status
- Actively exploited in the wild (CISA KEV)
- EPSS score
- 1.1% probability of exploitation in 30 days · 62th percentile
- Published
- 2026-05-21
Remediation guidance
CVE-2026-34926 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.
Apply the vendor's official security update for Trend Micro the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.
FIRST EPSS estimates a 1.1% probability that CVE-2026-34926 will be exploited within the next 30 days (62th percentile of all CVEs) — useful for risk-based patch sequencing.
Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.
Authoritative references
Remediate CVE-2026-34926 — and stay ahead of the next one
CVE-2026-34926 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2026-34926 and other Trend Micro issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.
📡 Get a free alert the moment a CVE like this lands in the KEV catalog → Join Sentinel APEX on Telegram