MicrosoftCVE-2026-66301

Microsoft Dynamics 365 (on-premises) version 9.1: information disclosure

CVE-2026-66301 · Published Aug 11, 2026 · updated Aug 17, 2026

Medium6.5

Fix: upgrade to 9.1.0047.0006 or later

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 versions

Package	Affected	Fixed in
Microsoft Dynamics 365 (on-premises) version 9.1 Product	>= 9.0, < 9.1.0047.0006	9.1.0047.0006

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-200

More Microsoft advisories

All Microsoft

High 7.1Aug 11

Copilot Chat Security Feature Bypass VulnerabilityCVE-2026-65675fixed in 1.132.1 High 7.8Aug 11

Copilot Custom Agent Hook Remote Code Execution VulnerabilityCVE-2026-70335fixed in 1.132.1 MediumAug 11

Information disclosure vulnerabilityCVE-2026-47285fixed in 1.132.1 High 8.8Aug 11

Fileless RCE in VS Code Web Remote Terminal via URL-Controlled NODE_OPTIONSCVE-2026-70336fixed in 1.132.1 High 8.8Aug 11

Visual Studio Code web deployments - environmentService.ts - RCE via NODE_OPTIONS --import from URL payloadCVE-2026-69320fixed in 1.132.1 High 7.8Aug 11

TerminalInstance._createProcess - Workspace Trust bypass via terminal waitOnExitCVE-2026-69278fixed in 1.132.1