Untrusted Pointer Dereference in Microsoft Office Word by Microsoft
CVE-2026-45471

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 2019
Microsoft Office 365 For Mac
Microsoft Office Ltsc 2021
Vendor
CVE Published:
9 June 2026

What is CVE-2026-45471?

A vulnerability in Microsoft Office Word can allow unauthorized attackers to execute arbitrary code by leveraging an untrusted pointer dereference. This flaw can lead to significant security risks, enabling attackers to potentially gain control over affected systems and execute harmful commands, thereby compromising the integrity and confidentiality of the user’s data. Users of affected versions should apply patches and updates provided by Microsoft to mitigate this risk.

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 365 for Mac 1.0.0 < 16.110.26061317

References

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

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.