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CVE-2026-65815Important

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

Deserialization of untrusted data in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.

Severity
Important
CVSS base score
8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
EPSS, next 30 days
1.7%Higher than 76.2% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
Exploitability
Exploitation Less Likely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Microsoft Dynamics 365 (on-premises)
Weakness
CWE-502: Deserialization of Untrusted Data
Issued by
Microsoft
Published
11 Aug 2026 · August 2026
Last revised
11 Aug 2026

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Microsoft Dynamics
1 affected product
  • Microsoft Dynamics 365 (on-premises) version 9.1
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