Patch tracker / CVE reference / CVE-2026-97003
CVE-2026-97003
CVE-2026-97003 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 8.8 (High). Microsoft has shipped the fix: deploy the update below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.
Microsoft rates it Important. CVSS 8.8 (High). Fixed by 1 Microsoft security update.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 8.8 (High).
This CVE is among the top half of tracked Microsoft CVEs by EPSS exploit probability.
This is an Excel remote code execution flaw rated High severity (CVSS 8.8) that is notable for spanning both the desktop and server sides: Microsoft Office LTSC 2021 in 32-bit and 64-bit editions, plus Office Online Server, which hosts Excel for browser access. It is not on the CISA KEV list, has no known ransomware use, and EPSS puts exploit probability at 1%, so there is no sign of active exploitation today. The exposure still matters because Office Online Server is often reachable by many internal users, which widens the population that could be targeted.
Do this: Inventory your Office LTSC 2021 installs and any Office Online Server hosts, then apply Microsoft's patch to the Office Online Server systems first, followed by the LTSC 2021 desktops.
AI-generated from public data, 2026-11-10. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-97003
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-97003
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing update KB5002928 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security update below to fix CVE-2026-97003. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Scope and sources
- Affected products
- Microsoft 365 Apps for Enterprise for 32-bit Systems
- Microsoft 365 Apps for Enterprise for 64-bit Systems
- Microsoft Office 365 for Mac
- Microsoft Office LTSC 2021 for 32-bit editions
- Microsoft Office LTSC 2021 for 64-bit editions
- Microsoft Office LTSC 2024 for 32-bit editions
- Microsoft Office LTSC 2024 for 64-bit editions
- Microsoft Office LTSC for Mac 2021
- Microsoft Office LTSC for Mac 2024
- Office Online Server
- Fixed by the same update
- Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.