What is CVE-2026-42833?

CVE-2026-42833 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-42833 cover?

CVE-2026-42833 covers the following CVE IDs: CVE-2026-42833. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-42833?

CVE-2026-42833 has a CVSS v3 base score of 9.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-42833?

CVE-2026-42833 affects 1 product, including: Microsoft Dynamics 365 (on-premises) version 9.1.

CVE-2026-42833HighCVSS 9.1

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-42833 →

📋 Description

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

🎯 Affected products1

Microsoft Dynamics 365 (on-premises) version 9.1

✅ Remediation

KB5078943 (Security Update) — fixed build 9.1.45.11

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42833
patchhttps://support.microsoft.com/en-us/topic/service-update-1-44-for-microsoft-dynamics-crm-on-premises-9-1-43630351-d782-4769-a59b-6a0f340c37f5
referencehttps://support.microsoft.com/help/5078943