Patch tracker / CVE reference / CVE-2026-47300

CVE-2026-47300

CVE-2026-47300 is a high severity Microsoft vulnerability with a CVSS score of 8.8. Microsoft has shipped the fix: deploy one of the 3 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

High

8.8

CVSS

1.1%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability 1.1%. CVSS 8.8 (High).

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

Senserva AI Opinion for CVE-2026-47300

CVE-2026-47300 is an ASP.NET Core elevation of privilege flaw rated High Severity (CVSS 8.8) that spans multiple runtimes: .NET 10.0 on Linux and Mac OS plus .NET 8.0 on Windows, so a single fix policy will not cover all your hosts. It is not in CISA KEV and has no known ransomware use, but the cross-platform spread means both your new .NET 10.0 workloads and older .NET 8.0 Windows apps need attention. The privilege escalation angle matters because a foothold in one web app could be leveraged to gain broader access on the host.

Do this: Inventory every host running .NET 10.0 on Linux or Mac OS and .NET 8.0 on Windows, then apply the vendor runtime patch for each affected version.

AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2026-47300

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2026-47300 (source: https://senserva.com/cve/CVE-2026-47300.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2026-47300: High severity Microsoft vulnerability, CVSS 8.8
- EPSS 30-day exploitation probability: 1.1%
- Actively exploited (CISA KEV): no
- Fixed by: KB5104032, KB5104033, KB5104034
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Schedule normally

No exploitation observed: not in the CISA KEV catalog, EPSS 1%.

Fixed by KB5104032 and 2 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.

Official patch(es) for CVE-2026-47300

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5104032, KB5104033, KB5104034 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-2026-47300. 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.

KB5104032 KB5104033 KB5104034

Scope and sources

Affected products

Fixed by the same updates

CVE-2026-47303 CVE-2026-50528 CVE-2026-47304 CVE-2026-50646 CVE-2026-50649 CVE-2026-50650 CVE-2026-47302 CVE-2026-50524

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

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