PatchSiren cyber security CVE debrief

CVE-2026-45207 Trend Micro, Inc. CVE debrief

CVE-2026-45207 is a local privilege-escalation vulnerability in the Apex One/SEP agent’s process-protection communication path. According to the supplied description, an attacker must already be able to execute low-privileged code on the target system, but could then abuse origin validation weakness to gain elevated privileges. NVD assigns it a 7.8 HIGH score and maps it to CWE-346.

Vendor: Trend Micro, Inc.
Product: TrendAI Apex One
CVSS: HIGH 7.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-05-21
Original CVE updated: 2026-05-21
Advisory published: 2026-05-21
Advisory updated: 2026-05-21

Who should care

Administrators and security teams responsible for Apex One/SEP agent deployments, especially on systems where low-privileged users or untrusted code execution are realistic footholds.

Technical summary

The supplied record describes an origin-validation flaw in a process-protection communication mechanism used by the agent. NVD records the issue with CVSS v3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H and CWE-346, indicating that a local attacker with limited privileges may be able to trigger unauthorized privileged behavior. The description notes this is similar to CVE-2026-45206 but affects a different communication path.

Defensive priority

High — treat as a priority local privilege-escalation fix because successful exploitation can elevate a pre-existing low-privilege foothold to high-impact access.

Recommended defensive actions

Follow the vendor remediation guidance referenced by NVD in Trend Micro advisory KA-0023430.
Prioritize patching or upgrading affected Apex One/SEP agent installations as soon as vendor fixes are available.
Reduce opportunities for low-privileged code execution on affected endpoints, since exploitation requires an initial local foothold.
Review host hardening and application-control controls on systems running the agent, especially where multiple local users exist.
Monitor affected environments for signs of unexpected privilege escalation or unauthorized changes from local accounts.

Evidence notes

The source corpus provides an official NVD record published on 2026-05-21 with the same modified timestamp, and the NVD metadata cites Trend Micro advisory KA-0023430. The supplied description explicitly states that the attacker must first obtain low-privileged code execution and that the flaw is similar to CVE-2026-45206 but in a different process-protection communication mechanism. No KEV entry is supplied.

Official resources

CVE-2026-45207 was published in the supplied CVE/NVD data on 2026-05-21 14:16:48 UTC. The provided corpus does not indicate KEV listing or known ransomware use.