CVE-2026-102858: Microsoft Office OneNote Remote Code Execution Vulnerability
Published Oct 13, 2026
·Updated
Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office OneNote Remote Code Execution Vulnerability
— Microsoft
Affected Software
4 affected components
Microsoft OneNote
Microsoft Office 365 for Mac
Microsoft Office LTSC for Mac 2024
Microsoft Office LTSC for Mac 2021
Event History
Oct 13, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·06:59 PM
Data Sourced
via MITRE·06:59 PM
DescriptionSeverity
Data Sourced
via NVD·07:17 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What does an attacker need to exploit this issue?
The attacker is unauthenticated and can target the vulnerability over a network, but exploitation requires user interaction. The provided data does not specify the exact user action required.
2
Which products should be included in remediation scope?
Include Microsoft OneNote, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2024, and Microsoft Office LTSC for Mac 2021. The supplied information does not identify specific affected or fixed versions.
3
What is the potential impact if exploitation succeeds?
Successful exploitation can allow remote code execution. The severity vector indicates high impacts to confidentiality, integrity, and availability.