KB5130034: what it fixes and who gets it
KB5130034 is a security update from Microsoft's October 2026 release for .NET 8.0 installed on Linux, .NET 8.0 installed on Mac OS, .NET 8.0 installed on Windows and other products.
Microsoft data read
Should you install it?
Yes. It closes holes Microsoft rates Critical, the most serious rating it uses. Windows Update installs it automatically on supported home PCs.
If the installation fails or the PC misbehaves afterwards, note the exact error code first: the fix depends on it. Our update troubleshooting guides are linked on this page.
Security fixes in KB5130034
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-105016Microsoft QUIC Remote Code Execution Vulnerability | Remote Code Execution | 9.8 | Critical |
| CVE-2026-88092ASP.NET Core Tampering Vulnerability | Tampering | 9.4 | Important |
| CVE-2026-70188ASP.NET Core Security Feature Bypass Vulnerability | Security Feature Bypass | 9.1 | Important |
| CVE-2026-70007.NET Framework Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-70035.NET Framework Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-70174.NET Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-83520.NET Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-85363.NET Framework Elevation of Privilege Vulnerability | Elevation of Privilege | 8.8 | Important |
| CVE-2026-87697.NET Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-96224.NET Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-96235.NET Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-70175ASP.NET Core Elevation of Privilege Vulnerability | Elevation of Privilege | 8.1 | Important |
| CVE-2026-70197.NET Remote Code Execution Vulnerability | Remote Code Execution | 8.1 | Important |
| CVE-2026-96225.NET Elevation of Privilege Vulnerability | Elevation of Privilege | 7.8 | Important |
| CVE-2026-96231.NET Elevation of Privilege Vulnerability | Elevation of Privilege | 7.8 | Important |
| CVE-2026-58280.NET Denial of Service Vulnerability | Denial of Service | 7.5 | Important |
| CVE-2026-69651.NET Denial of Service Vulnerability | Denial of Service | 7.5 | Important |
| CVE-2026-70183ASP.NET Core Elevation of Privilege Vulnerability | Elevation of Privilege | 7.5 | Important |
| CVE-2026-70186ASP.NET Core Denial of Service Vulnerability | Denial of Service | 7.5 | Important |
| CVE-2026-96232.NET Information Disclosure Vulnerability | Information Disclosure | 7.5 | Important |
| CVE-2026-96233ASP.NET Core Denial of Service Vulnerability | Denial of Service | 7.5 | Important |
| CVE-2026-96236ASP.NET Core Denial of Service Vulnerability | Denial of Service | 7.5 | Important |
| CVE-2026-96237.NET Remote Code Execution Vulnerability | Remote Code Execution | 7.5 | Important |
| CVE-2026-96229.NET Information Disclosure Vulnerability | Information Disclosure | 6.5 | Important |
| CVE-2026-96238.NET Security Feature Bypass Vulnerability | Security Feature Bypass | 6.5 | Important |
| CVE-2026-66822.NET Information Disclosure Vulnerability | Information Disclosure | 5.9 | Important |
| CVE-2026-70196ASP.NET Core Denial of Service Vulnerability | Denial of Service | 5.9 | Important |
| CVE-2026-96234.NET Information Disclosure Vulnerability | Information Disclosure | 5.3 | Important |
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