Patch tracker / CVE reference / CVE-2026-26112
CVE-2026-26112
CVE-2026-26112 is a high severity Microsoft vulnerability with a CVSS score of 7.8. Microsoft has shipped the fix: deploy one of the 2 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 7.8 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.
An Excel remote code execution flaw rated High Severity at CVSS 8.4, slightly above the usual Office parsing baseline, affecting Office Online Server and Office 2019. EPSS currently sits at 0 percent with no exploitation evidence. The server-side rendering path in Office Online Server remains the more interesting exposure, since one crafted workbook uploaded to a portal can execute where documents are previewed.
Do this: Patch Office Online Server farms alongside desktop Office 2019 rather than on a slower server cadence.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-26112
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-26112
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5002846, KB5002849 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2026-26112. 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
- Fixed by the same updates
- Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.