CVE intelligence

CVE-2026-47303

Vulnerability intelligence

Published Jul 14, 2026Sources checked Oct 28, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-47303 and is rated High severity with a CVSS score of 8.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Aug 7, 2026

Vendor remediation details

Release Notes Install KB5104034. Install KB5104032. Install KB5104033.

Vendor-listed releases

10.0.10
8.0.29
9.0.18
17.12.22
17.14.36
18.7.4

CISA KEVNot listedBased on the latest collected catalog

EPSS0.8%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-47303?

Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

Source: NVD