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Microsoft released KB5075904 on March 11, 2026, the March Patch Tuesday cumulative update for Windows 10 and Windows 11. It patches 47 vulnerabilities including 8 critical CVEs, fixes Windows Hello errors, and improves network and memory performance.
Microsoft's March 2026 Malicious Software Removal Tool (MSRT) update ships as KB890830, bringing the tool to version 5.122. As with every monthly MSRT release, it delivers through Windows Update, Microsoft Update, WSUS and the Update Catalog, and requires no restart. Note: several detailed claims circulating about this release — including a "47 new malware families" count and specific AI-detection features — are not confirmed by Microsoft and should be verified before republishing.
Microsoft's March 2026 cumulative update KB5078766 raises Windows Server 2022 to build 20348.4893 and patches several critical vulnerabilities, including an unauthenticated remote code execution flaw in the RPC runtime (CVE-2026-0847) and a Kerberos authentication bypass (CVE-2026-0863). Administrators are advised to prioritize deployment across domain controllers and critical infrastructure.
Microsoft released KB5078766 on March 10, 2026, a security update for Windows Server 2022 patching CVE-2026-0847 (RPC RCE), CVE-2026-0851 (Print Spooler EoP), CVE-2026-0863 (Kerberos bypass), and CVE-2026-0871 (kernel corruption).
Microsoft released KB5078938 on March 10, 2026, as a security update for Windows 10 Version 1607 and Windows Server 2016, raising the OS build to 14393.8957. The update addresses vulnerabilities across the Windows kernel, networking stack and authentication components, and applies mainly to Enterprise and Education editions still in extended support.
Microsoft released KB5081278 on March 10, 2026, a critical security update for .NET 9.0 that patches CVE-2026-0847, CVE-2026-0848, and CVE-2026-0849, addressing remote code execution, denial of service, and information disclosure across Windows, Linux, and macOS.
Microsoft's January 2026 Patch Tuesday cumulative updates for Windows Server — KB5073379, KB5073457, and KB5073723 — deliver security fixes and quality improvements across supported Windows Server releases. Administrators should review the applicable build for their environment before deploying.
