What is CVE-2026-45208?

CVE-2026-45208 is a high-severity vulnerability in Trendmicro Apex_one, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.8/10. Published 2026-05-21.

How severe is CVE-2026-45208?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Trendmicro Apex_one

CVE-2026-45208

A time-of-check time-of-use vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on th…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.000 (3.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Trendmicro Apex_one
Trend Micro, Inc. Trendai Apex One — versions 2019 (14.0)
Trend Micro, Inc. Trendai Apex One As A Service — versions SaaS

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

security@trendmicro.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-45208?: CVE-2026-45208 is a high-severity vulnerability in Trendmicro Apex_one, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.8/10. Published 2026-05-21.
How severe is CVE-2026-45208?: High severity. CVSS v3 base score is 7.8 out of 10.