Remote Code Execution in Microsoft Word Software by Microsoft
CVE-2026-40367

8.4HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 2019
Microsoft Office Ltsc 2021
Microsoft Office Ltsc 2024
Vendor
CVE Published:
12 May 2026

What is CVE-2026-40367?

A vulnerability in Microsoft Word enables an attacker to exploit an untrusted pointer dereference, potentially allowing unauthorized execution of code on the affected systems. This flaw requires close attention to errant inputs, as a successful attack can compromise data integrity and system security. Users are encouraged to apply the latest security patches to mitigate risks associated with this vulnerability.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 2019 32-bit Systems 19.0.0

Microsoft Office LTSC 2021 32-bit Systems 16.0.1

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.