CVE-2026-118299 · Other
NO FIX YET
A heap-based buffer overflow in Microsoft Office Excel lets an unauthorized attacker execute code over a network. The sources give no further detail on how a victim is reached.
first public Nov 10, 2026 · 1 source
Could this affect your app?
Free first check from your website. Connect your repo for the full answer.
Organizations running Microsoft Office Excel are the likely exposure; the sources do not name affected builds or whether opening a file is enough to trigger it. unknown
Who cares excel, microsoft-office, windows
No fix yet, per the sources.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
Check it with your coding agent
It reads this page and tells you if your code is affected.
Are you affected?
Ask from here. InfraStack checks the affected versions against your stack and answers in your inbox.
InfraStack checks the affected versions against your stack and answers in Slack, with the evidence and the fix.