Patch tracker / CVE reference / CVE-2026-26112

CVE-2026-26112

CVE-2026-26112 is a high severity Microsoft vulnerability with a CVSS score of 8.4. 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.

High

High severity Microsoft vulnerability, CVSS 8.4. Fixed by 2 Microsoft security updates.

Senserva AI read on CVE-2026-26112Official patches for CVE-2026-26112Change historyAdmin questions

Risk summary

CVSS base
8.4
EPSS exploit probability
<1%
Severity
High

Senserva AI Opinion for CVE-2026-26112

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.

Schedule normally
No exploitation observed: not in the CISA KEV catalog, EPSS under 1%.
Fixed by KB5002846 and 1 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.
Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Updated August 7, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Full tracking and change history for CVE-2026-26112

Published
2026-03-10
Last revised
2026-03-10
Changes tracked
1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

Exploitation and severity

Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 8.4 (High).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.

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.

KB5002846KB5002849

Affected products

Fixed by the same updates

If you are patching CVE-2026-26112, the same updates also fix these:

CVE-2026-26107CVE-2026-26108CVE-2026-26109

Authoritative references

Official CVE record (cve.org)NVD detailMicrosoft MSRCFIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
Data notice: this page, the feeds, and the API are provided as is, for informational purposes only, without warranty of any kind. Senserva, LLC does not guarantee the accuracy, completeness, or timeliness of third-party data (MSRC, NVD, CISA KEV, EPSS) and accepts no liability for actions taken based on it; verify against the authoritative vendor advisory before acting. Built daily with Senserva Trustworthy AI. All use of this data is subject to the Senserva EULA.