Patch tracker / CVE reference / CVE-2026-97758
CVE-2026-97758
CVE-2026-97758 is a Microsoft vulnerability that Microsoft rates Critical, 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Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date.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 Critical. 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.
CVE-2026-97758 is an Excel remote code execution flaw that affects only the Mac builds of Microsoft Office: Office 365 for Mac, Office LTSC for Mac 2021, and Office LTSC for Mac 2024. Severity is High (CVSS 8.8), but the EPSS exploit probability is 1%, it is not in the CISA KEV catalog, and no ransomware use is known, so there is no evidence of active exploitation right now. The exposure is concentrated in Mac fleets and in users who open spreadsheets from outside the organization, which are often unmanaged or lightly patched compared with Windows endpoints.
Do this: Inventory Mac endpoints running these three Office builds and push the Microsoft update through your normal Mac patch channel (for example Microsoft AutoUpdate or your MDM), starting with users who routinely open Excel files from external senders.
AI-generated from public data, 2026-11-10. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-97758
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-97758
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-2026-97758. 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.