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CVE-2026-42898CriticalRevised 29 May

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

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

Severity
Critical
CVSS base score
9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
EPSS, next 30 days
1.0%Higher than 61% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
Public exploit code
No Nuclei template lists it
Exploitability
Exploitation Unlikely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Microsoft Dynamics 365 (on-premises)
Weakness
CWE-94: Improper Control of Generation of Code ('Code Injection')
Issued by
Microsoft
Published
12 May 2026 · May 2026
Last revised
29 May 2026Updated an acknowledgement. This is an informational change only.

Updates that fix it

1 KB
KBTypeRestartApplies toOther CVEs
KB5078943 Security Update — Microsoft Dynamics 365 (on-premises) version 9.1 All CVEs in KB5078943

Affected products

Microsoft Dynamics
1 affected product
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