CVE-2026-42898

CRITICALNVD 9.99.9—

9.9

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

CVSS v3: 9.9
EG Score: 9.9(high)
EPSS: 29.7%
KEV: Not listed

Published

May 12, 2026

Last Modified

May 14, 2026

Advisory Details (1)

Auto-updated May 15, 2026

Patch available. Sources: microsoft.

microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42898

Vendor Advisories for CVE-2026-42898(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-42898
Microsoft Security Response Center (MSRC)Remote Code Execution
Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

Frequently asked(5)

What is CVE-2026-42898?

CVE-2026-42898 is a critical vulnerability published on May 12, 2026. Improper control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.

When was CVE-2026-42898 disclosed?

CVE-2026-42898 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on May 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-42898 actively exploited?

CVE-2026-42898 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-42898?

CVE-2026-42898 has a CVSS v3 base score of 9.9 (NVD).

How do I remediate CVE-2026-42898?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42898, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-42898

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

Security Update Guide - Microsoft Security Response Center

📣 Vendor Advisories for CVE-2026-42898(1)

❓ Frequently asked(5)