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Microsoft's June 2026 security update KB5094125 patches five vulnerabilities in Windows Server 2025, including a critical unauthenticated Remote Desktop Services RCE (CVE-2026-0235) and a Hyper-V guest-to-host escape (CVE-2026-0237). The update raises the OS build to 26100.32995 and applies to all editions across full GUI and Server Core installations.
Microsoft released KB5087539 on May 12, 2026, a security update for Windows Server 2025 that patches remote code execution, privilege escalation and information disclosure flaws across the kernel, Active Directory Domain Services and Remote Desktop Services. The update raises the OS build to 26100.32860 and applies to Standard and Datacenter editions in both Desktop Experience and Server Core.
Microsoft released KB5087545 for Windows Server 2022 on May 12, 2026, patching five critical vulnerabilities including an unauthenticated RDP remote code execution flaw (CVE-2026-0145, CVSS 9.8) and a Hyper-V guest-to-host escape. The cumulative update raises the OS build to 20348.5139 and carries several known post-install issues.
Microsoft released KB5082123 on April 14, 2026, a security update for Windows 10 Version 1809 and Windows Server 2019 that patches five vulnerabilities, including critical remote code execution flaws in Remote Desktop Services and SMB. The update brings systems to OS Build 17763.8644 and carries known issues affecting Print Spooler, Remote Desktop and SMB.
