Heap-based Buffer Overflow in Windows Win32K Affects Microsoft Products
CVE-2026-68880

8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Office 365 For Mac
Microsoft Office For Android
Microsoft Office Ltsc For Mac 2021
Microsoft Office Ltsc For Mac 2024
Vendor
CVE Published:
8 September 2026

What is CVE-2026-68880?

A heap-based buffer overflow in the Windows Win32K component allows an attacker with authenticated access to elevate their privileges through a network connection. This weakness can lead to unauthorized control over system resources, potentially compromising system integrity.

Affected Version(s)

Microsoft Office 365 for Mac 1.0.0 < 16.112.26090911

Microsoft Office for Android 16.0.1 < 16.0.20430.20000

Microsoft Office LTSC for Mac 2021 16.0.1 < 16.112.26090911

References

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

CVSS V3.1

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.