Heap-Based Buffer Overflow in Microsoft Office Word by Microsoft
CVE-2026-108428

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-2026-108428?

A heap-based buffer overflow vulnerability in Microsoft Office Word could allow an unauthorized attacker to execute arbitrary code remotely. By exploiting this vulnerability, attackers may gain control over affected systems and perform unauthorized actions. It is crucial for users to apply the latest security updates to mitigate this risk and ensure their systems remain secure.

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

.