Heap-based Buffer Overflow in Microsoft Office Word by Microsoft
CVE-2026-108429

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-2026-108429?

A heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute arbitrary code over a network. This vulnerability could potentially enable an attacker to take control of affected systems, leading to unauthorized information access or manipulation. Users are advised to apply the recommended security updates as per Microsoft's advisory to mitigate this risk.

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

.