CVE-2026-34926
Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Deadline for federal agencies: 2026-06-04.
4 articles across 4 outlets · first covered May 21, 2026 · latest May 22, 2026
Coverage timeline
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CISA Flags CVE-2025-34291 Langflow Flaw in KEV Updatesecurityaffairs.com · May 22, 2026
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Trend Micro patches zero day Apex One flaw CVE-2026-34926www.securityweek.com · May 22, 2026
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CISA Flags Trend Micro Apex One Flaw (CVE‑2026‑34926) in KEVwww.cisa.gov · May 21, 2026
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CISA Flags Trend Micro Apex One Flaw (CVE‑2026‑34926) in KEVcisa.gov · May 21, 2026