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Microsoft confirmed and resolved a bug where Classic Outlook crashed on startup when the Teams Meeting Add-in version 1.26.02603 was enabled. The fix shipped in Teams version 26058.712.4527.9297 on March 30, 2026.
Microsoft confirmed a known issue (EX1254044) where classic Outlook crashes and restarts in Safe Mode on older Office builds running the newest Teams Meeting Add-in, and has since shipped a fix.
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 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.
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 Superseded by .NET 8.0.28 (July 2026).
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 Now superseded by KB5102335 (July).
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.
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.
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.
