What is CVE-2025-55238?

CVE-2025-55238 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Improper Access Control. CVSS score: 7.5/10. Published 2025-09-04.

How severe is CVE-2025-55238?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Microsoft Dynamics 365

CVE-2025-55238

Dynamics 365 FastTrack Implementation Assets Information Disclosure Vulnerability

Published 2025-09-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55238 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-55238?: CVE-2025-55238 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Improper Access Control. CVSS score: 7.5/10. Published 2025-09-04.
How severe is CVE-2025-55238?: High severity. CVSS v3 base score is 7.5 out of 10.