windows server updates

CVE-2026-54121 is a high-severity Active Directory Certificate Services privilege-escalation vulnerability that can let an authenticated attacker gain additional privileges remotely. Microsoft fixed the flaw in its July 14, 2026 security updates, making patching certificate authority servers the...

Microsoft’s January 2026 Patch Tuesday brings a focused, security-first cumulative update to Windows 11 and Windows Server platforms: consumer and managed devices receive fixes rather than flashy features, while server editions are updated with distinct KB identifiers and targeted enterprise...