Heap-Based Buffer Overflow Vulnerability in Microsoft Office Access by Microsoft
CVE-2026-69477

7.3HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Access 2016
Microsoft Access 2016 (32-bit Edition)
Microsoft Office 2019
Vendor
CVE Published:
8 September 2026

What is CVE-2026-69477?

A vulnerability in Microsoft Office Access allows an authorized attacker to exploit a heap-based buffer overflow. By executing specially crafted code, the attacker could gain the ability to perform actions locally on the affected system. This vulnerability places users at risk, highlighting the need for organizations to apply the latest security updates and patches to protect against potential exploits.

Affected Version(s)

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

Microsoft Access 2016 (32-bit edition) 16.0.0 < 16.0.5569.1000

Microsoft Access 2016 x64-based Systems 16.0.0 < 16.0.5569.1000

References

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

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.