Heap-Based Buffer Overflow in Microsoft Office Products by Microsoft
CVE-2026-70130

8.4HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 2019
Microsoft Office Ltsc 2021
Microsoft Office Ltsc 2024
Vendor
CVE Published:
11 August 2026

What is CVE-2026-70130?

A heap-based buffer overflow vulnerability in Microsoft Office enables unauthorized attackers to execute arbitrary code on a victim's system. This flaw arises when processing specially crafted files, potentially allowing malicious actors to take control of the affected application. Users are advised to apply the necessary patches to safeguard their systems against exploitation.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 2019 32-bit Systems 19.0.0

Microsoft Office LTSC 2021 32-bit Systems 16.0.1

References

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

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.