Heap-Based Buffer Overflow in Microsoft Office Access by Microsoft
CVE-2026-69778

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-69778?

A vulnerability in Microsoft Office Access allows an unauthorized attacker to exploit a heap-based buffer overflow condition, potentially enabling remote code execution over a network. This issue could result in significant security risks as attackers may execute arbitrary code on affected systems, making it crucial for users to apply any available patches and updates to mitigate this risk.

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 < 16.0.5569.1002

Microsoft Access 2016 x64-based Systems 16.0.0 < 16.0.5569.1002

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

.