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

UpdateWindows Malicious Software Removal Tool (MSRT)

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 read

Windows Server 2022 update screen showing security patch installation

ResolvedWindows Server 2022 Standard

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 read

Windows Update screen showing a cumulative security update installing on a Windows Server system

ResolvedWindows 10 Version 1809

Microsoft Ships KB5078752 for Windows 10 1809 and Server 2019

Microsoft released KB5078752, a cumulative security update for Windows 10 Version 1809 and Windows Server 2019 dated March 10, 2026, raising the OS build to 17763.8511 and patching privilege-escalation and remote code execution flaws across Windows Kernel, RDS, Graphics, CLFS and Print Spooler components.

Mar 11, 20264 min read

Microsoft update KB5081277, which patches CVE-2026-26130, a denial-of-service vulnerability affecting .NET 8.0.25.

Resolved.NET 8.0 Runtime

KB5081277 Patches CVE-2026-26130 Denial of Service in .NET 8.0.25

KB5081277 patches CVE-2026-26130 (.NET Denial of Service) in .NET 8.0, updating to version 8.0.25. Available on Windows, Linux, and macOS. Superseded by .NET 8.0.28 (July 2026).

Mar 11, 20262 min read

Microsoft update KB5077469, which patches a Merge Replication elevation-of-privilege vulnerability in SQL Server 2019 CU32.

ResolvedSQL Server 2019 (Windows)

KB5077469 Patches Merge Replication EoP in SQL Server 2019 CU32

KB5077469 patches CVE-2026-21262 (merge replication EoP) and CVE-2026-26115 in SQL Server 2019 CU32. Build 15.0.4460.4. First of three consecutive monthly SQL Server 2019 EoP patches. Now superseded by KB5102335 (July).

Mar 11, 20262 min read

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

ResolvedWindows Server 2022 Standard

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 read

Windows Update screen showing a security update installing on a server

ResolvedWindows 10 Version 1607

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 read

Microsoft KB5081278 security update for .NET 9.0.14.

AdvisoryMicrosoft

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 read

Enterprise Windows 11 devices receiving monthly security updates without a restart via Windows Autopatch

ReleaseWindows Autopatch

Microsoft Enables Windows Hotpatch by Default for Eligible Intune Devices

Starting with the May 2026 security update, Windows Autopatch enables hotpatch security updates by default for eligible Intune-managed (and Microsoft Graph) devices - applying monthly fixes without a restart. Tenant opt-out controls arrived April 1, 2026, with a grace period to May 11.

Mar 10, 20267 min read

Windows Server update settings screen showing available cumulative updates

ResolvedWindows 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 read