What is CVE-2025-53378?

CVE-2025-53378 is a high-severity vulnerability in Microsoft Windows, classified under Missing Authentication for Critical Function. CVSS score: 7.6/10. Published 2025-07-10.

How severe is CVE-2025-53378?

High severity. CVSS v3 base score is 7.6 out of 10.

Auth bypass in Microsoft Windows

CVE-2025-53378

A missing authentication vulnerability in Trend Micro Worry-Free Business Security Services (WFBSS) agent could have allowed an unauthenticated attacker to remotely take control of the agent on affected installations. Also note: this vulnerability only affected the SaaS client version of WFBSS only, meaning the on-premise version of Worry-Free Business Security was not affected, and this issue was addressed in a WFBSS monthly maintenance update. Therefore no other customer action is required to mitigate if the WFBSS agents are on the regular SaaS maintenance deployment schedule and this disclosure is for informational purposes only.

Vulnerability class: Broken Authentication

EPSS: 0.006 (47.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H.

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

security@trendmicro.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-53378?: CVE-2025-53378 is a high-severity vulnerability in Microsoft Windows, classified under Missing Authentication for Critical Function. CVSS score: 7.6/10. Published 2025-07-10.
How severe is CVE-2025-53378?: High severity. CVSS v3 base score is 7.6 out of 10.