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The March 2026 Malicious Software Removal Tool update KB890830, released as version 5.122.

Microsoft Ships March 2026 MSRT Update (KB890830) as Version 5.122

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.

Mar 11, 20264 min readEmanuel De Almeida

Microsoft ships KB5078766 for Windows Server 2022 – critical RPC and Kerberos flaws patched (cybersecurity illustration).

NewsMicrosoft

Microsoft Ships KB5078766 for Windows Server 2022, Patching Critical RPC and Kerberos Flaws

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.

Mar 11, 20265 min readEmanuel De Almeida

Microsoft update KB5078766, which patches critical RPC and Kerberos vulnerabilities in Windows Server 2022.

NewsMicrosoft

Microsoft Patches Critical RPC and Kerberos Flaws in Windows Server 2022 with KB5078766

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).

Mar 11, 20263 min readEmanuel De Almeida

Microsoft KB5078938 update graphic for Windows Server 2016 and Windows 10 version 1607, featuring a laptop, security shield.

NewsMicrosoft

Microsoft Ships KB5078938 for Windows Server 2016 and Windows 10 1607

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.

Mar 11, 20265 min readEmanuel De Almeida

Microsoft security update KB5081278, which patches critical vulnerabilities in .NET 9.0.

NewsMicrosoft

KB5081278 Updates .NET 9.0 to 9.0.14 With Two Security Fixes

Microsoft released KB5081278 on March 10, 2026 for .NET 9.0.14. The release notes list CVE-2026-26127 and CVE-2026-26130, replacing the three unrelated CVEs previously cited here.

Mar 11, 20261 min readEmanuel De Almeida

Windows Server January 2026 updates graphic listing KB5073379, KB5073457, and KB5073723, with server racks, an update icon.

NewsWindows Server

Windows Server January 2026 Updates: KB5073379, KB5073457, KB5073723

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.

Jan 14, 20263 min readEmanuel De Almeida