CVE-2026-102858: Microsoft Office OneNote Remote Code Execution Vulnerability
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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.114.26101123
Event History
Frequently Asked Questions
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.
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.
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.