What is CVE-2023-35389?

CVE-2023-35389 is a medium-severity vulnerability in Microsoft Dynamics 365, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.5/10. Published 2023-08-08.

How severe is CVE-2023-35389?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XXE in Microsoft Dynamics 365

CVE-2023-35389

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

Vulnerability class: XXE (XML External Entity)

Published 2023-08-08 · last modified 2026-08-10.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.008 (53.5th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.5% 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

Microsoft Dynamics 365
Microsoft Dynamics 365 (On-Premises) Version 9.0 — versions 9.0.0

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35389 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-35389?: CVE-2023-35389 is a medium-severity vulnerability in Microsoft Dynamics 365, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.5/10. Published 2023-08-08.
How severe is CVE-2023-35389?: Medium severity. CVSS v3 base score is 6.5 out of 10.