Out-of-Bounds Read Vulnerability in Microsoft Office
CVE-2026-44821

5.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 2016
Microsoft Office 2019
Microsoft Office 365 For Mac
Vendor
CVE Published:
9 June 2026

What is CVE-2026-44821?

An out-of-bounds read vulnerability in Microsoft Office enables attackers to exploit the software and gain unauthorized access to sensitive information. By leveraging this flaw, an attacker may be able to disclose local information, compromising user confidentiality. It is crucial to apply the appropriate patches and updates provided by Microsoft to mitigate the risks associated with this vulnerability.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 2016 32-bit Systems 16.0.0 < 16.0.5556.1005

Microsoft Office 2019 32-bit Systems 19.0.0

References

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

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.