Heap-based Buffer Overflow in Microsoft Graphics Component
CVE-2026-81955

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 2016
Microsoft Office 2019
Microsoft Office 365 For Mac
Vendor
CVE Published:
8 September 2026

What is CVE-2026-81955?

A heap-based buffer overflow vulnerability in the Microsoft Graphics Component enables unauthorized attackers to execute arbitrary code remotely. This security flaw can be exploited over a network, potentially allowing attackers to gain control of impacted systems and execute malicious actions without user interaction. It is critical for users to apply available patches to mitigate the risk associated with this vulnerability.

Affected Version(s)

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

Microsoft Office 2016 32-bit Systems 16.0.0 < 16.0.5569.1003

Microsoft Office 2019 32-bit Systems 19.0.0 < 16.0.10417.20207

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

.