Untrusted Pointer Dereference in Microsoft Office Word by Microsoft
CVE-2026-45486

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 365 For Mac
Microsoft Office Ltsc For Mac 2021
Microsoft Office Ltsc For Mac 2024
Vendor
CVE Published:
9 June 2026

What is CVE-2026-45486?

A vulnerability in Microsoft Office Word permits an unauthorized attacker to exploit an untrusted pointer dereference issue, leading to potential local code execution. This flaw exposes systems using specified versions of Microsoft Office Word to various risks, emphasizing the need for prompt updates and security measures to protect sensitive data and maintain system integrity.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 365 for Mac 1.0.0 < 16.110.26061317

Microsoft Office LTSC for Mac 2021 16.0.1 < 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

.