MSRC-CVE-2026-66301 — Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability

Summary

Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What type of information could be disclosed by this vulnerability?
The type of information that could be disclosed if an attacker successfully exploited this vulnerability is sensitive information.

Security updates
9.1.0047.0006 — https://support.microsoft.com/en-US/servicing/dynamics/crm/microsoft-dynamics-365-on-premises-cumulative-updates

Vulnerabilities 1

Medium 6.5

CVE-2026-66301

Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to disclose information over a network.

Microsoft Microsoft Dynamics 365 (on-premises) version 9.1

Aug 11, 2026

Revision history

2026-08-11 #1
Information published.

References

CVE-2026-66301 Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66301
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss