Heap-based Buffer Overflow in Microsoft Office Word Affects Microsoft
CVE-2026-72973

8.8HIGH

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:
8 September 2026

What is CVE-2026-72973?

A heap-based buffer overflow vulnerability in Microsoft Office Word allows an attacker to execute arbitrary code remotely. This can occur when a specially crafted document is opened, enabling the unauthorized execution of commands on the user's system over a network. It is critical for users to apply the recommended security patches to mitigate potential risks associated with this vulnerability.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1 < 16.0.20326.20138

Microsoft Office 2019 32-bit Systems 19.0.0 < 16.0.10417.20207

Microsoft Office 365 for Mac -

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.