Patch tracker / CVE reference / CVE-2026-118708
CVE-2026-118708
CVE-2026-118708 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.
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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 Not scored. CVSS 8.8 (High).
CVE-2026-118708 is an Excel remote code execution flaw that is notable because it affects only the Mac editions: Microsoft Office LTSC for Mac 2021, Office LTSC for Mac 2024, and Office 365 for Mac. Severity is High (CVSS 8.8), but CISA has not listed it as exploited and there is no known ransomware use, so this is a patch-promptly item rather than an emergency. Mac fleets are often managed separately from Windows and can fall behind on Office updates, which makes them easy to overlook here.
Do this: Inventory every Mac running Office LTSC 2021, LTSC 2024, or Office 365 for Mac and push the Microsoft update that addresses CVE-2026-118708 through your Mac management tooling.
AI-generated from public data, 2026-11-10. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-118708
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-118708
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing update KB5002946 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-2026-118708. 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.