Sep 2026: Windows Win32k Elevation of Privilege Vulnerability
CVE-2026-68880 Published on September 8, 2026
Windows Win32k Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges over a network.
Weakness Types
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Numeric Truncation Error
Truncation errors occur when a primitive is cast to a primitive of a smaller size and data is lost in the conversion. When a primitive is cast to a smaller primitive, the high order bits of the large value are lost in the conversion, potentially resulting in an unexpected value that is not equal to the original value. This value may be required as an index into a buffer, a loop iterator, or simply necessary state data. In any case, the value cannot be trusted and the system will be in an undefined state. While this method may be employed viably to isolate the low bits of a value, this usage is rare, and truncation usually implies that an implementation error has occurred.
Products Associated with CVE-2026-68880
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Affected Versions
Microsoft Office 365 for Mac:- Version 1.0.0 and below 16.112.26090911 is affected.
- Version 16.0.1 and below 16.0.20430.20000 is affected.
- Version 16.0.1 and below 16.112.26090911 is affected.
- Version 16.0.0 and below 16.112.26090911 is affected.