CVE-2026-55133

Name of the Vulnerable Software and Affected Versions Microsoft Office OneNote (affected versions not specified)

Description A heap-based buffer overflow occurs in Microsoft Office OneNote, which could allow an unauthorized attacker to execute code locally. A heap-based buffer overflow is a memory corruption issue that happens when a program writes more data to a heap-allocated memory block than it can hold.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.