# Microsoft June 2026 security update patches 145+ Windows flaws

Published: 2026-06-10 · Severity: routine
Canonical: https://vorant.io/reports/f35c2275-5458-503b-b630-16edd77cc38c/microsoft-june-2026-security-update-patches-145-windows-flaws

> Microsoft's June 2026 patch batch addresses 145+ vulnerabilities across Windows, .NET, and Remote Desktop, including remote code execution and privilege elevation risks.

CERT-FR has published an advisory covering a large batch of vulnerabilities in Microsoft Windows and related components released by Microsoft on 9 June 2026. The affected systems include multiple versions of Windows 10 and Windows 11 across 32-bit, x64, and ARM64 architectures, Windows Server 2012 through 2025, .NET versions 8.0, 9.0, and 10.0, Windows Remote Desktop client, Windows App Client, and Windows Narrator Braille. The vulnerabilities enable remote code execution, privilege escalation, denial of service, data confidentiality and integrity compromise, and security policy bypass. Defenders should prioritize updating affected systems to the patched versions specified in the advisory, consulting Microsoft's security bulletins for each CVE for specific impact and mitigation details.

## Mentioned in this report

- Vulnerabilities: CVE-2025-10263, CVE-2026-33828, CVE-2026-34335, CVE-2026-40404, CVE-2026-40409, CVE-2026-41092, CVE-2026-41108, CVE-2026-42828, CVE-2026-42829, CVE-2026-42836, CVE-2026-42837, CVE-2026-42903, CVE-2026-42904, CVE-2026-42905, CVE-2026-42906, CVE-2026-42907, CVE-2026-42908, CVE-2026-42909, CVE-2026-42910, CVE-2026-42911, CVE-2026-42912, CVE-2026-42913, CVE-2026-42914, CVE-2026-42915, CVE-2026-42916, CVE-2026-42968, CVE-2026-42969, CVE-2026-42970, CVE-2026-42971, CVE-2026-42972, CVE-2026-42973, CVE-2026-42974, CVE-2026-42977, CVE-2026-42978, CVE-2026-42979, CVE-2026-42980, CVE-2026-42981, CVE-2026-42983, CVE-2026-42984, CVE-2026-42985

Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0728

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