What is CVE-2023-32553?

CVE-2023-32553 is a medium-severity vulnerability in Microsoft Windows, classified under Origin Validation Error. CVSS score: 5.3/10. Published 2023-06-26.

How severe is CVE-2023-32553?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Microsoft Windows

CVE-2023-32553

An Improper access control vulnerability in Trend Micro Apex One and Apex One as a Service could allow an unauthenticated user under certain circumstances to disclose sensitive information on agents. This is similar to, but not identical to CVE-2023-32552.

Published 2023-06-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (39.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Microsoft Windows
Trendmicro Apex One — versions 2019
Trend Micro, Inc. Micro Apex One — versions 2019

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

success.trendmicro.com/dcx/s/solution/000293108 (Patch, Vendor Advisory)
www.zerodayinitiative.com/advisories/ZDI-23-653/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2023-32553?: CVE-2023-32553 is a medium-severity vulnerability in Microsoft Windows, classified under Origin Validation Error. CVSS score: 5.3/10. Published 2023-06-26.
How severe is CVE-2023-32553?: Medium severity. CVSS v3 base score is 5.3 out of 10.