What is CVE-2026-65772?

CVE-2026-65772 is a high-severity vulnerability in Microsoft Dynamics 365 (On-Premises) Version 9.1, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-09-08.

How severe is CVE-2026-65772?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Microsoft Dynamics 365 (On-Premises) Version 9.1

CVE-2026-65772

Deserialization of untrusted data in Microsoft Dynamics 365 allows an authorized attacker to execute code over a network.

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Dynamics 365 (On-premises) Version 9.1

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-65772?: CVE-2026-65772 is a high-severity vulnerability in Microsoft Dynamics 365 (On-Premises) Version 9.1, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-09-08.
How severe is CVE-2026-65772?: High severity. CVSS v3 base score is 8.8 out of 10.