Heap-Based Buffer Overflow Vulnerability in Microsoft Office Word
CVE-2026-108447

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office Ltsc 2021
Microsoft Office Ltsc 2024
Vendor
CVE Published:
15 October 2026

What is CVE-2026-108447?

A vulnerability exists in Microsoft Office Word that allows an unauthorized attacker to exploit a heap-based buffer overflow condition. This flaw could enable the execution of arbitrary code when a user interacts with a malicious document, potentially compromising the security of the affected system. Users are encouraged to apply available patches and follow best practices to mitigate risks associated with this vulnerability.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office LTSC 2021 32-bit Systems 16.0.1 < 16.0.14334.20974

Microsoft Office LTSC 2024 32-bit Systems 16.0.0 < 16.0.17932.21056

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

.