Microsoft Office OneNote Remote Code Execution Vulnerability

HighVendor CVSS 8.8 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.

Release Notes

Update history

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Oct 13, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Oct 13, 2026 at 10:55 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Oct 15, 2026 at 7:00 AM UTC
Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
Oct 21, 2026 at 1:15 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Details collected from Microsoft Security Response Center.

Official bulletin How SecurityAlert builds this record

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