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Microsoft Security Response CenterCVE-2026-42898

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

Improper control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.

Read the vendor bulletin Get alerts for Microsoft Dynamics 365 (on-premises)
9.9CVSS out of 10Critical severity
Scope

What the vendor says is affected

  • Microsoft Dynamics 365 (on-premises) version 9.1

Versions the vendor lists as fixed

  • 9.1.45.11
Next step

What the vendor recommends

Install KB5078943.

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-42898View CVSS, KEV, EPSS, and threat context
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