KB5099414: what it fixes and who gets it
KB5099414 is a security update from Microsoft's July 2026 release for Windows 11 Version 23H2.
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 KB5099414
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-42982Windows Secure Kernel Mode Elevation of Privilege Vulnerability | Elevation of Privilege | 7.8 | Critical |
| CVE-2026-42990SQL Server ODBC driver Elevation of Privilege Vulnerability | Remote Code Execution | 9.8 | Important |
| CVE-2026-49172Windows FTP Service Remote Code Execution Vulnerability | Remote Code Execution | 9.8 | Important |
| CVE-2026-44800Windows Push Notifications Elevation of Privilege Vulnerability | Elevation of Privilege | 7.8 | Important |
| CVE-2026-50471Windows NTFS Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-58601Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability | Elevation of Privilege | 7.8 | Important |
| CVE-2026-40378Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability | Denial of Service | 7.5 | Important |
| CVE-2026-50696Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability | Denial of Service | 7.5 | Important |
| CVE-2026-58640Windows NTFS Remote Code Execution Vulnerability | Remote Code Execution | 7.3 | Important |
| CVE-2026-48571Windows App Package Installer Elevation of Privilege Vulnerability | Elevation of Privilege | 7.0 | Important |
| CVE-2026-48572Windows App Package Installer Elevation of Privilege Vulnerability | Elevation of Privilege | 7.0 | Important |
| CVE-2026-56173Windows WebView Elevation of Privilege Vulnerability | Elevation of Privilege | 7.0 | Important |
| CVE-2026-58629DirectX Graphics Kernel Elevation of Privilege Vulnerability | Elevation of Privilege | 7.0 | Important |
| CVE-2026-34348Windows Event Logging Service Information Disclosure Vulnerability | Information Disclosure | 6.5 | Important |
| CVE-2026-33842Windows File Explorer Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-34328Windows Audio Service Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-34346Windows Ancillary Function Driver for WinSock Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
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