What is CVE-2026-42898?

CVE-2026-42898 is a critical-severity vulnerability in Microsoft Dynamics_365, classified under Code Injection. CVSS score: 9.9/10. Published 2026-05-12.

How severe is CVE-2026-42898?

Critical severity. CVSS v3 base score is 9.9 out of 10.

RCE in Microsoft Dynamics_365

CVE-2026-42898

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

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.001 (24.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Microsoft Dynamics_365
Microsoft Dynamics 365 (On-premises) Version 9.1 — versions 9.0

Weakness classification (CWE)

CWE-94 — Code Injection

References

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42898?: CVE-2026-42898 is a critical-severity vulnerability in Microsoft Dynamics_365, classified under Code Injection. CVSS score: 9.9/10. Published 2026-05-12.
How severe is CVE-2026-42898?: Critical severity. CVSS v3 base score is 9.9 out of 10.