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Windows Defender
Microsoft's built-in Windows endpoint protection; a SYSTEM-privilege flaw actively exploited before the June 2026 patch.
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#10 9 Jul
Microsoft ends the Nightmare Eclipse run
Cybersecurity: Threats and Defences#9 1 Jul
BlueHammer turns into a ransomware step
Cybersecurity: Threats and Defences#8 17 Jun
Affected by TOCTOU race allowing privilege escalation to SYSTEM
Cybersecurity: Threats and Defences: A handle keeps dropping MS zero-days#7 9 Jun