Important CVSS 9.1 EPSS 0.00748 2026-05 archive

Executive Summary

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

Overview

9.1
CVSS CRITICAL
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released May 12 2026
Last Updated May 12 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00748 — 0.50006 percentile
NVD CVSS 9.1 CRITICAL — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Changed
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.9

EPSS Score

0.00748
probability of exploitation in the next 30 days
0.50006 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

1 affected product
Product KB Article Severity Impact Restart Required
Microsoft Dynamics 365 (on-premises) version 9.1 5078943 (Security Update) Important Remote Code Execution Maybe

Patches

1 patch
Article Type Restart
5078943 Security Update Maybe

Known Exploits

Acknowledgments

nxhoang99, TALHA GÜNAY, f7d8c52bec79e42795cf15888b85cbad, GMO Cybersecurity by Ierae, Inc.