What is CVE-2026-66301?

CVE-2026-66301 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability

Which CVE IDs does CVE-2026-66301 cover?

CVE-2026-66301 covers the following CVE IDs: CVE-2026-66301. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-66301?

CVE-2026-66301 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-66301?

CVE-2026-66301 affects 1 product, including: Microsoft Dynamics 365 (on-premises) version 9.1.

CVE-2026-66301HighCVSS 6.5

Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

August 14, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-66301 →

📋 Description

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

🎯 Affected products1

Microsoft Dynamics 365 (on-premises) version 9.1

✅ Remediation

KBRelease Notes (Security Update) — fixed build 9.1.0047.0006

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66301
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108757
referencehttps://support.microsoft.com/en-US/servicing/dynamics/crm/microsoft-dynamics-365-on-premises-cumulative-updates