Windows Server
3 mentions across all digests
Server operating system also affected by BlueHammer, allowing standard users to escalate to administrator access.
Windows Defender is being used to hack Windows
BlueHammer, an unpatched privilege escalation zero-day in Windows Defender, is being actively exploited with publicly released proof-of-concept code to escalate from user to system-level access on Windows 10/11 and Server.
UK tribunal sends £2B claim accusing Microsoft of overcharging for licensing to trial
UK tribunal clears £2B collective action by ~59,000 businesses claiming Microsoft overcharged for Windows Server licensing off-Azure compared to its own cloud platform.
RedSun: System user access on Win 11/10 and Server with the April 2026 Update
Windows Defender's file recovery mechanism can be abused to overwrite system binaries and escalate privileges on Windows 11, 10, and Server—a critical flaw in antivirus-aware threat handling.