Read the docs
TI-2026-54237 Aliases CVE-2026-77908GHSA-xwmw-4qgg-5h34

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

Priority MEDIUM 42CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00987 62nd percentileScored 2026-11-07
Fix Fixed Microsoft: 1 update

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Dynamics 365 Customer Engagement V9.19.0 to before 9.1.0048.00049.1.0048.0004Patch availableCNA
  • Microsoft Dynamics 365 Customer Engagement V9.1 VendorMicrosoft Affected 9.0 to before 9.1.0048.0004 Fixed in 9.1.0048.0004 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:dynamics_365:*:*:*:*:customer_engagement:*:*:*before 9.1.0048.0004VulnerableMicrosoft
  • cpe:2.3:a:microsoft:dynamics_365:*:*:*:*:customer_engagement:*:*:* Versions before 9.1.0048.0004 Vulnerable ·Microsoft

Remediation

Microsoft 1 update

  • KB5123731
    Security Update
    • Microsoft Dynamics 365 Customer Engagement V9.1 9.1.0048.0004

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
—

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77908
  2. 2026-10-03 Alias added: GHSA-xwmw-4qgg-5h34

References

Patch 1

  • TI-2018-06256 Improper output encoding in Microsoft Dynamics 365 CVSS 3.0HIGH 8.8
  • TI-2020-12866 Microsoft Dynamics 365 (on-premises) Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-31102 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2024-25464 Microsoft Dynamics 365 Elevation of Privilege Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2022-15512 Microsoft Dynamics CRM (on-premises) Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-35158 Dynamics 365 Elevation of Privilege Vulnerability CVSS 3.1CRITICAL 9.9
See all 102 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences