Trend Micro Apex One CVE-2026-45207

Exploitation requires the attacker to already have the ability to execute low-privileged (non-administrative, but authenticated) code on a Windows endpoint where the vulnerable Trend Micro Apex One agent is installed and the affected process-protection IPC mechanism is active - this is explicitly stated in the advisory note and is consistent with the CVSS vector AV:L/PR:L/UI:N. Exploitation is limited by the local-only attack vector (no remote network reach), the need for pre-existing code execution on the target, and the requirement that the host be running an unpatched agent build (<14.0.0.17079 on-prem or <14.0.20731 SaaS); no user interaction or special non-default product configuration is required beyond a standard Apex One deployment.

The CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H is internally consistent with the description: local attack vector, low complexity, low-privileged authenticated access required, no user interaction, and full CIA impact on the compromised host - a textbook local-EoP profile producing a 7.8 score. No EPSS score, KEV listing, or POC was provided, so this is no public exploit identified at time of analysis. Real-world risk is moderate-to-high for endpoints where untrusted users can already run code (multi-user workstations, jump hosts, malware-detonation analysts, terminal servers), because Apex One is itself the security control and bypassing it removes defenders' visibility; on tightly controlled single-admin endpoints the prerequisite of pre-existing low-priv code execution materially limits exposure. The fact that the issue was reported by the vendor itself rather than third-party exploitation telemetry argues for a coordinated-disclosure scenario rather than mass exploitation.

An attacker who has already obtained low-privileged code execution on a workstation - for example through a phishing-delivered user-mode payload, a compromised standard domain account on a terminal server, or a malicious insider - sends crafted IPC messages to a privileged Apex One protection component while spoofing the identity of a trusted Trend Micro peer process. Because the receiving component fails to validate the true origin of the message, it acts on the attacker's instructions with SYSTEM-level privileges, allowing the attacker to disable the endpoint security agent, tamper with protected processes, or execute follow-on code as SYSTEM. No public PoC is referenced.